Final answer:
The natural physical drive to eat when your body needs food is hunger.
Step-by-step explanation:
The natural physical drive to eat when your body needs food is hunger. Hunger is the physiological mechanism that signals our bodies to seek out and consume food. It is triggered by empty stomachs, messages from the digestive system, blood glucose levels, and chemical signals to the brain. Hunger is an important mechanism that ensures we get the nutrients and energy our bodies need for survival.