Answer:
Sigmund Freud
Explanation:
Sigmund Freud was one of the well-known and famous psychologists of his time. He was famous for his work in psychology as he has introduced the psychoanalytic theory in which he has mentioned three distinct stages of mind and personality and along with this he has given the five different stages of the psychosexual development through which an individual passes by in his or her life.
According to Sigmund Freud, the ego is one of the major components of the personality and works on the reality principle. A child who has encountered ego believes and understands that each desire, needs, or urges of him or her can't be fulfilled immediately and learns certain moral values.
