They have not been eating nourishing food.

The correct answer is D. poor.

The word “nourishing” means “providing or giving nourishment.” Nourishing food is food that provides the body with the nutrients it needs to stay healthy. This includes foods that are high in protein, fiber, vitamins, and minerals.

Food that is poor in nutrients is not nourishing. This type of food is often high in calories and low in nutrients. It can also be unhealthy, as it may contain harmful chemicals or additives.

Here is a brief explanation of each option:

• A. Heavy: Heavy food is food that is high in calories. It can be nutritious, but it can also be unhealthy if it is eaten in excess.
• B. Undercooked: Undercooked food is food that has not been cooked to the proper temperature. This type of food can be dangerous to eat, as it may contain harmful bacteria.
• C. Unhygienic: Unhygienic food is food that has been prepared or stored in an unclean environment. This type of food can also be dangerous to eat, as it may contain harmful bacteria.

I hope this helps!