The process by which the body takes in nutrients is called nutrition. This is the correct answer out of the options given.
Here's a breakdown of the options provided:
- Calories: Calories are a unit of energy. While they are a component of nutrition, the process of taking in nutrients is broader than just calories.
- Nutrition: Nutrition is the correct term for the process of taking in nutrients. It involves the consumption, digestion, absorption, and utilization of nutrients by the body to maintain health and function.
- Fiber: Fiber is a type of carbohydrate that the body cannot digest. It is essential for digestive health but is just one component of the broader process of nutrition.
- Homeostasis: Homeostasis refers to the body's ability to maintain stable internal conditions despite external changes. While nutrition plays a role in supporting homeostasis, it is not the same as the process of taking in nutrients.
Therefore, the correct term for the process by which the body takes in nutrients is "Nutrition."