Concept:Psychosocial development theory was proposed by Erik Erikson, a German-American psychologist who emphasized social and cultural influences across the lifespan.
Explanation:Erik Erikson expanded on Sigmund Freud’s psychosexual theory by focusing on social and cultural factors.
He outlined eight stages of development, each with a unique crisis (e.g., Trust vs. Mistrust in infancy, Identity vs. Role Confusion in adolescence).
Successfully resolving each crisis leads to healthy psychological growth, while failure may cause difficulties.
Erikson’s work spans the entire human life, from infancy to old age.
Thus, the theory of psychosocial development is attributed to Erik Erikson.
Answer:B. Erik Erikson