The fact that many happy and well-adjusted adults were once rebellious and unhappy as adolescents is most relevant to the issue of fluid or crystallized intelligence. continuity or stages. nature or nurture. stability or change. preconventional or postconventional morality.

stability or change.

Explanation:

Developmental psychology is a theoretical methodology that seeks to understand development, change, and continuity over a lifetime. It is looking at how perception, thought, and actions change during a person's life. Stability vs. Change is one such theory which stresses that stability means that the personality traits present during adolescence endure for a lifetime. Change theories, on the other hand, claim that attitudes are influenced by social relationships, school encounters, and acculturation.