The document discusses different aspects of motivation including its definition, approaches, classifications of motives, and human needs and motivation related to eating, achievement, affiliation, and power. It defines motivation as the factors that direct and energize behavior and considers it the "why" of behavior. Some key approaches discussed are instinct, drive reduction, and arousal theory. Motives are classified as biological needs, social needs, and sexual motivation. The document also covers the motivation behind hunger and eating, roots of obesity, eating disorders, and needs for achievement, affiliation, and power.