Meaning: 'Healthy' refers to being in good physical condition or free from illness.

Wrong options:

• natural: 'Natural' is an adjective that describes something derived from nature, but it does not fit the context of describing a state of being.
• artificial: 'Artificial' refers to something made or produced by human beings rather than occurring naturally, which contradicts the intended meaning of maintaining health.
• extreme: 'Extreme' is an adjective that suggests something is at the highest degree, which does not appropriately describe a state of health.
• cleansing: 'Cleansing' is a gerund that refers to the act of removing impurities, but it does not describe a state of being.
• habits: 'Habits' is a noun that refers to regular practices or routines, which does not fit grammatically as it cannot describe a state of being.
• nutrients: 'Nutrients' is a noun that refers to substances that provide nourishment, which does not fit as it does not describe a state of health.
• good: 'Good' is an adjective that describes a positive quality but is too vague and does not specifically relate to health.

Correct answer: cleansing

Explanation: The term 'cleansing' is a gerund that refers to the process of removing toxins or impurities from the body, which fits contextually with the idea of extreme diets aimed at improving health. It aligns grammatically as it follows 'go on' and maintains the overall theme of health improvement.

Meaning: 'Cleansing' refers to the act of detoxifying or purifying the body, often through specific diets or procedures.

Wrong options:

• natural: 'Natural' is an adjective that does not fit grammatically after 'go on' as it cannot describe an action or process.
• artificial: 'Artificial' is an adjective that describes something not natural, which does not fit the context of health-related procedures.
• extreme: 'Extreme' is an adjective that describes a high degree but does not fit as a noun or gerund to follow 'go on.'
• healthy: 'Healthy' is an adjective that does not fit grammatically as it cannot describe an action or process.
• habits: 'Habits' is a noun that does not fit grammatically after 'go on' as it cannot describe an action.
• nutrients: 'Nutrients' is a noun that does not fit grammatically after 'go on' as it cannot describe an action or process.
• good: 'Good' is an adjective that does not fit grammatically as it cannot describe an action or process.

Correct answer: artificial

Explanation: The word 'artificial' serves as an adjective that describes food that is not natural, which fits contextually as it contrasts with the idea of healthy eating. It maintains grammatical coherence as it modifies 'food' and aligns with the negative sentiment towards processed products.

Meaning: 'Artificial' refers to something made or produced by human beings rather than occurring naturally, often implying a lack of health benefits.

Wrong options:

• natural: 'Natural' is an adjective that describes something derived from nature, which contradicts the intended meaning of unhealthy food.
• extreme: 'Extreme' is an adjective that describes a high degree but does not appropriately describe food in this context.
• healthy: 'Healthy' is an adjective that describes food beneficial for health, which does not fit the context of discussing undesirable food.
• cleansing: 'Cleansing' is a gerund that refers to a process rather than a description of food, making it grammatically incorrect here.
• habits: 'Habits' is a noun that does not fit grammatically as it cannot describe food.
• nutrients: 'Nutrients' is a noun that refers to substances providing nourishment, which does not fit as a description of food.
• good: 'Good' is an adjective that describes a positive quality but is too vague and does not specifically relate to food.

Correct answer: natural

Explanation: The term 'natural' is an adjective that describes methods that are derived from nature, fitting contextually as it contrasts with artificial methods. It aligns grammatically as it modifies 'methods' and supports the overall theme of promoting health through traditional practices.

Meaning: 'Natural' refers to something that exists in or is produced by nature, without artificial additives.

Wrong options:

• artificial: 'Artificial' is an adjective that describes something not natural, which contradicts the intended meaning of promoting health.
• extreme: 'Extreme' is an adjective that describes a high degree but does not appropriately describe methods in this context.
• healthy: 'Healthy' is an adjective that describes something beneficial for health but does not fit as a description of methods.
• cleansing: 'Cleansing' is a gerund that refers to a process rather than a description of methods, making it grammatically incorrect here.
• habits: 'Habits' is a noun that does not fit grammatically as it cannot describe methods.
• nutrients: 'Nutrients' is a noun that refers to substances providing nourishment, which does not fit as a description of methods.
• good: 'Good' is an adjective that describes a positive quality but is too vague and does not specifically relate to methods.

Correct answer: nutrients

Explanation: The word 'nutrients' is a noun that refers to substances that provide nourishment essential for health, fitting contextually as it describes what healthy food should contain. It aligns grammatically as it serves as the object of the preposition 'of' and supports the overall message of maintaining health.

Meaning: 'Nutrients' are substances that provide nourishment essential for the growth and maintenance of life.

Wrong options:

• natural: 'Natural' is an adjective that does not fit grammatically as it cannot serve as an object in this context.
• artificial: 'Artificial' is an adjective that describes something not natural, which does not fit as it does not describe what food contains.
• extreme: 'Extreme' is an adjective that describes a high degree but does not appropriately describe what food contains in this context.
• cleansing: 'Cleansing' is a gerund that refers to a process rather than a description of what food contains, making it grammatically incorrect here.
• habits: 'Habits' is a noun that does not fit grammatically as it cannot describe what food contains.
• healthy: 'Healthy' is an adjective that describes food beneficial for health but does not fit as a description of what food contains.
• good: 'Good' is an adjective that describes a positive quality but is too vague and does not specifically relate to nutrients.