Meaning: 'Fruits and vegetables' refer to the edible parts of plants that are rich in vitamins, minerals, and fiber, crucial for a healthy diet.

Wrong options:

• meats and sweets: This option suggests a combination of protein and sugary foods, which does not align with the goal of a balanced diet focused on health and nutrients.
• oils and fats: While oils and fats are part of a diet, they do not provide the same range of vitamins and minerals as fruits and vegetables, making this option less suitable.
• sugars and salts: This combination is generally associated with unhealthy eating habits and does not contribute positively to a balanced diet.

Correct answer: increase

Explanation: The verb 'increase' is grammatically correct as it indicates a positive change in quantity, fitting well with the context of enhancing nutrient intake. It logically follows the action of choosing whole grains, which is intended to boost nutrient levels.

Meaning: 'Increase' means to make something larger or greater in amount, which in this case refers to the intake of essential fibre and nutrients.

Wrong options:

• decrease: This option implies a reduction, which contradicts the intended outcome of choosing whole grains to enhance nutrient intake.
• stagnate: This suggests no change, which is not applicable here as the context is about improving nutrient intake through better food choices.
• fluctuate: This indicates variability, which does not fit the context of consistently increasing nutrient intake.

Correct answer: boosting

Explanation: The gerund 'boosting' fits grammatically as it describes the action of enhancing metabolism, aligning with the context of hydration's positive effects on bodily functions.

Meaning: 'Boosting' means to increase or improve something, in this case, metabolism, which is essential for energy and digestion.

Wrong options:

• hindering: This option suggests a negative effect, which contradicts the positive role of hydration in metabolism.
• ignoring: This implies neglect, which does not fit the context of actively supporting metabolism through hydration.
• suspending: This suggests a temporary halt, which is not relevant to the ongoing process of metabolism that hydration supports.

Correct answer: long-term

Explanation: The adjective 'long-term' fits grammatically as it describes the duration of the benefits, aligning with the context of sustainable dietary changes leading to lasting effects.

Meaning: 'Long-term' refers to effects or benefits that persist over an extended period, emphasizing the importance of consistent dietary changes.

Wrong options:

• immediate: This suggests instant results, which does not align with the gradual nature of health benefits from dietary changes.
• negligible: This implies minimal impact, which contradicts the idea of significant benefits from making dietary changes.
• adverse: This indicates negative effects, which is the opposite of the intended positive outcomes of improving one's diet.