Question

what is a calorie? the amount of energy in the form of heat that it takes to raise the temperature of 1 gram of water 1 degree celsius a unit of energy that is used to show how nutritious certain foods are a vital nutrient that all animals require for survival

Explanation:

A calorie is a unit of energy. In the context of food, it indicates the energy - content which can be related to nutritional value. The first option is a more technical definition of a small - calorie (gram - calorie), but in food context, the second option is more common. A calorie is not a nutrient.

Answer:

A unit of energy that is used to show how nutritious certain foods are