Which of the following is NOT a developmental task of adolescence?

During adolescence, individuals go through several key developmental tasks as they transition from childhood to adulthood. One of the primary tasks is establishing physical maturation, which includes changes in body size, shape, and sexual characteristics. Romantic and sexual relationships also become significant during this period, as adolescents begin to explore their identities in relation to others. Additionally, membership in a peer group is crucial, as friendships and social dynamics become increasingly important in shaping self-identity and social skills.

Establishing a family, however, is not typically a developmental task associated with adolescence. This task generally occurs later in life when individuals have reached a level of maturity and stability that allows them to form long-term commitments, such as marriage and parenting. Therefore, this option is accurately identified as not belonging to the primary developmental tasks encountered during the adolescent phase, making it the correct answer.