Maslow’s Hierarchy of Needs has often been represented in a hierarchical pyramid with five levels. The four levels (lower-order needs) are considered physiological needs, while the top level of the pyramid is considered growth needs. The lower level needs must be satisfied before higher-order needs can influence behavior. The levels are as follows

• Self-actualization – includes morality, creativity, problem solving, etc.
• Esteem – includes confidence, self-esteem, achievement, respect, etc.
• Belongingness – includes love, friendship, intimacy, family, etc.
• Safety – includes security of environment, employment, resources, health, property, etc.
• Physiological – includes air, food, water, sex, sleep, other factors towards homeostasis, etc.