Final answer:
A pound of body fat stores approximately 3,500 kcal, which is useful information for understanding energy balance related to weight gain and loss.
Step-by-step explanation:
A pound of body fat stores about 3,500 kilocalories (kcal) for later use. This amount of energy is equivalent to what would be stored in the body if an extra 3,500 Calories were consumed and not utilized for any work or heat transfer.
It is important to note that weight management involves balancing the number of calories consumed with the number consumed through daily activities and bodily functions.