Answer:
Hunger is a feeling of physical discomfort that is caused by your body's need for nutrients. Appetite is a desire for food that is not based off of a need, but a craving.
Step-by-step explanation:
Hunger
A feeling of physical discomfort that is caused by your body's need for nutrients
basal metabolic rate
The rate at which you use energy when your body is at rest.
Appetite
A desire for food that is based on emotions and other factors rather than nutritional need.