Lower-level Needs: These are the basic physiological and safety needs according to Maslow's hierarchy. They include things like food, water, shelter, and security.
Deficiency Needs: Refers to the lower-level needs that arise due to their absence or deficiency; they motivate individuals until they are satisfied.
Self-esteem Needs: Once lower-level needs are met, self-esteem needs become important. They involve gaining recognition, approval from others, and developing a positive self-image.