The amount of energy a person can consume throughout the day without gaining weight is extremely dependent on activity level. Correct answer: D
Our bodies need energy (calories) which we get from food in order to perform on normal everyday processes like breathing and pumping blood, and this is referred to as the basal metabolic rate ( about 1,300-1,500 kcal/day for an adult female and 1,600-1,800 kcal/day for an adult male). However, the body needs energy also for physical activity. The more active the more calories are needed. This is the reason why athletes need far more calories during the day than the other people.