Which term matches the definition: Units of heat that measure the energy used by the body and the energy that foods supply to the body.

• A. Nutrition
• B. Calories (energy)
• C. Botulism
• D. Organic food

Answer: (B)

Calories (energy) describe the units of heat used to measure how much energy the body uses and how much energy foods supply. In nutrition, the energy content of foods is measured in calories (often labeled as kilocalories on food labels). The body consumes this energy for everything from basal metabolism to movement, and foods differ in calories based on their macronutrient makeup—fat provides about 9 kcal per gram, while carbohydrates and proteins provide about 4 kcal per gram. The other terms don’t fit because nutrition is the field of study, botulism is a dangerous illness, and organic food refers to how a product is grown, not its energy content.