The number of calories you need simply to breathe, pump blood, grow hair, and be alive is called the
a. calorie budget.
b. total calorie need.
c. active metabolic rate.
d. resting metabolic rate.

D. resting metabolic rate.

Explanation:

The number of calories you need simply to breathe, pump blood, grow hair, and be alive is called the resting metabolic rate.

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