According to Freud's theory, the developmental periods that leave their mark on adult personality are

A) defence mechanism stages.
B) fixation stages.
C) psychological stages.
D) psychosexual stages.

Psychosexual Stages

A theory in Freudian psychology that proposes five stages of childhood development, each characterized by sexual pleasure centered on a particular erogenous zone.

Developmental Periods

Distinct phases during the lifespan of an organism, marked by specific physical, psychological, or emotional attributes that are associated with a particular age range.

Adult Personality

The characteristic patterns of thoughts, feelings, and behaviors that make a person unique and which tend to stabilize in adulthood.