Answer:
Abraham Maslow
Explanation:
Psychologist Abraham Maslow first developed his famous theory of individual development and motivation in the 1940’s. He suggested that human beings have a hierarchy of needs. This hierarchy suggests that people are motivated to fulfill basic needs before moving on to other, more advanced needs.
Abraham Maslow represented this theory as a hierarchical triangle. This shows how basic needs must be met before one can “climb” the hierarchy, to address more complex needs.