The nutrient that provides 4 calories per gram and gives the body energy

The choices can be found elsewhere and as follows:

a.) fat 
b.) carbohydrates 
c.) minerals 
d.) vitamins 

I think the correct answer from the choices is option B. The nutrient that provides 4 calories per gram and gives the body energy is carbohydrates. Hope this answers the question.

Ibelieve its b but u might have to

Because the carnivores keep the herbivore population in check