Here are the completed sentences based on the prompts provided:
- Nutrition is the process by which the body takes in and uses nutrients.
- Hunger is a natural physical drive to eat.
- Calories are units of heat energy that food supplies to the body.
- Appetite is a desire, rather than a need, to eat.
- Nutrients are substances your body needs to grow, repair itself, and provide you with energy.
Feel free to ask if you need further assistance!