It can be considered a driving force; a psychological drive that compels or reinforces an action toward a desired goal. For example, hunger is a motivation that elicits a desire to eat. Motivation has been shown to have roots in physiological, behavioral, cognitive, and social areas. Motivation may be rooted in a basic impulse to optimize well-being, minimize physical pain and maximize pleasure. It can also originate from specific physical needs such as eating, sleeping or resting, and sex. Motivation is an inner drive to behave or act in a certain manner.