Explain Maslow's hierarchy of needs.
1. Biological and Physiological needs - air, food, drink, shelter, warmth, sex, sleep.
2. Safety needs - protection from elements, security, order, law, stability, freedom from fear.
3. Love and belongingness needs - friendship, intimacy, affection and love, - from work group, family, friends, romantic relationships.
4. Esteem needs - achievement, mastery, independence, status, dominance, prestige, self-respect, respect from others.
5. Self-Actualization needs - realizing personal potential, self-fulfillment, seeking personal growth and peak experiences.