The energy that's given to the body by food isa. measured in units called calories. b. a nutrient that's essential for growth and development. c. best obtained by eating high protein. d. excreted by the body if not used.

a. Measured in units called calories.

Explanation:

The energy that is given to the body by food is measured in calories, which is a unit that measures the energy that is present in food, precisely in the joins between molecules and that can settle into our body as weight or burnt while doing physical activities.