Drive-Reduction Theory:This theory suggests that physiological needs create an aroused state that drives us to reduce the need by engaging in some behavior - in this case, eating.
Homeostasis:The tendency of a system, especially the physiological system of higher animals, to maintain internal stability, owing to the coordinated response of its parts to any situation or stimulus tending to disturb its normal condition or function.
Physiological Needs:These are biological requirements for human survival including air, food, drink, shelter and clothing. If these requirements are not met, the human body cannot function properly and will ultimately fail.