A. Calories are units of energy. They refer...

Câu hỏi: A. Calories are units of energy. They refer to the amount of energy you get from foods and drinks, and the amount of energy you use through physical activities. For example, an apple has about 80 calories, while a 1.6 km walk might use up 100 calories. Calories are important for human health, and the key is having the right amount of it.

A. They are units of energy.

B. They are the amount of energy.

C. They are important.

D. Each person needs different amounts of calories.