We need fat in our diets because fats have lots of calories. We need calories for energy. This is the denotation of option A.
Nearly everything, if not all, that we eat has fats in it. Eating fats is bad in the sense of excessive absorption; however, a sufficient amount of fat consumption can endow the body its energy needed to carry out daily activities as simple as walking and standing idle. The portion of fats that build our cell membrane are known as lipids, while the portion giving energy is known as carbohydrates.
