The correct response would be:
You should only eat as many calories as your body needs.
Recognizing the difference between hunger (the physiological need for food) and appetite (the desire to eat for reasons other than hunger, such as emotional or environmental factors) is important for maintaining a healthy diet and managing body weight. Eating based on true hunger helps ensure that you are fueling your body appropriately, while eating based on appetite or emotional cues can lead to overeating or unhealthy food choices.