Final answer:
Maslow's hierarchy of needs consists of five levels: physiological needs, safety needs, social needs, esteem needs, and self-actualization.
Step-by-step explanation:
Maslow's hierarchy of needs consists of five levels. At the base of the pyramid are physiological needs, such as food, water, and shelter. The next level is safety needs, followed by social needs, which include the need for love and belonging. The fourth level is esteem needs, which involve the need for self-worth and confidence. The top tier of the pyramid is self-actualization, which represents achieving one's full potential.