Final answer:
Personal fable and imaginary audience are parts of adolescent egocentrism.
Step-by-step explanation:
According to David Elkind, personal fable and imaginary audience are parts of adolescent egocentrism. Adolescents often experience a heightened sense of self-importance and believe that others are excessively interested in their thoughts and behaviors. The personal fable refers to the belief that one's experiences and feelings are unique and incomprehensible to others, while the imaginary audience involves the perception that one is constantly being observed and judged by others.