Macronutrients. With water, they make up about 98% of the diet. Macronutrients provide calories, ie energy (a calorie is a unit of measurement established by estimating the heat released by the oxidation of the food in the body); they also play several other roles.
There are 3 macronutrients: carbohydrates, lipids, and proteins.
lower shelf, this question is missing some key information because it also depends on what kind of refrigerator it is. ex freezer on top or bottom or side.
