Meaning: 'Levels' refers to the amount or degree of stress present.

Wrong options:

• than: The word 'than' is a conjunction used for comparisons, which does not fit the context of discussing stress.
• lack: The word 'lack' is a noun that does not fit grammatically in this context, as it does not refer to a quantity of stress.
• order: The word 'order' is a noun that does not relate to the context of stress levels and is grammatically incorrect here.
• therefore: The word 'therefore' is an adverb indicating a conclusion, which does not fit as a noun in this context.
• thus: The word 'thus' is also an adverb used to indicate a conclusion, which does not fit as a noun in this context.
• promote: The word 'promote' is a verb that does not fit grammatically as it does not refer to a quantity of stress.
• progress: The word 'progress' is a noun that does not relate to the context of stress levels.

Correct answer: therefore

Explanation: The word 'therefore' serves as a conjunctive adverb that indicates a conclusion drawn from the previous statement about stress. It fits logically and contextually, linking the cause of stress to the necessity for action.

Meaning: 'Therefore' means as a result or for that reason, indicating a logical conclusion.

Wrong options:

• levels: The word 'levels' is a noun that does not fit grammatically as it does not serve as a conclusion or transition in this context.
• lack: The word 'lack' is a noun that does not fit grammatically as it does not serve as a conclusion or transition in this context.
• order: The word 'order' is a noun that does not fit grammatically as it does not serve as a conclusion or transition in this context.
• thus: The word 'thus' is an adverb that indicates a conclusion but is less formal than 'therefore' and does not fit the tone of the text as well.
• promote: The word 'promote' is a verb that does not fit grammatically as it does not serve as a conclusion or transition in this context.
• progress: The word 'progress' is a noun that does not fit grammatically as it does not serve as a conclusion or transition in this context.
• than: The word 'than' is a conjunction used for comparisons, which does not fit the context of indicating a conclusion.

Correct answer: lack

Explanation: The word 'lack' fits grammatically as a noun that describes the absence of sleep, which is contextually relevant to the discussion of stress and its consequences. It aligns with the phrase 'lack of sleep,' a common expression.

Meaning: 'Lack' refers to the absence or deficiency of something, in this case, sleep.

Wrong options:

• levels: The word 'levels' is a noun that does not fit grammatically as it does not refer to the absence of sleep.
• order: The word 'order' is a noun that does not relate to the context of sleep and is grammatically incorrect here.
• therefore: The word 'therefore' is an adverb that does not fit grammatically as it does not refer to a noun related to sleep.
• thus: The word 'thus' is an adverb that does not fit grammatically as it does not refer to a noun related to sleep.
• promote: The word 'promote' is a verb that does not fit grammatically as it does not refer to a noun related to sleep.
• progress: The word 'progress' is a noun that does not relate to the context of sleep and is grammatically incorrect here.
• than: The word 'than' is a conjunction used for comparisons, which does not fit the context of discussing sleep.

Correct answer: promote

Explanation: The word 'promote' is a verb that fits grammatically and contextually, as it indicates the action of encouraging healthier lifestyles. It aligns with the overall message of the text regarding health improvement.

Meaning: 'Promote' means to support or actively encourage a cause or aim, in this case, healthier lifestyles.

Wrong options:

• levels: The word 'levels' is a noun that does not fit grammatically as it does not indicate an action related to health.
• lack: The word 'lack' is a noun that does not fit grammatically as it does not indicate an action related to health.
• order: The word 'order' is a noun that does not fit grammatically as it does not indicate an action related to health.
• therefore: The word 'therefore' is an adverb that does not fit grammatically as it does not indicate an action related to health.
• thus: The word 'thus' is an adverb that does not fit grammatically as it does not indicate an action related to health.
• progress: The word 'progress' is a noun that does not fit grammatically as it does not indicate an action related to health.
• than: The word 'than' is a conjunction used for comparisons, which does not fit the context of promoting health.

Correct answer: order

Explanation: The word 'order' fits grammatically as a noun that indicates a requirement or necessity for action. It aligns with the context of discussing the need for government intervention to ensure a better future.

Meaning: 'Order' refers to a state of arrangement or requirement, in this case, the necessity for action.

Wrong options:

• levels: The word 'levels' is a noun that does not fit grammatically as it does not indicate a requirement for action.
• lack: The word 'lack' is a noun that does not fit grammatically as it does not indicate a requirement for action.
• therefore: The word 'therefore' is an adverb that does not fit grammatically as it does not indicate a requirement for action.
• thus: The word 'thus' is an adverb that does not fit grammatically as it does not indicate a requirement for action.
• promote: The word 'promote' is a verb that does not fit grammatically as it does not indicate a requirement for action.
• progress: The word 'progress' is a noun that does not fit grammatically as it does not indicate a requirement for action.
• than: The word 'than' is a conjunction used for comparisons, which does not fit the context of indicating a requirement.