How is self-concept best defined?

Self-concept is best defined as who an individual believes they are. This definition encompasses a person's understanding and evaluation of their own identity, including their beliefs, feelings, and perceptions about themselves. Self-concept is intrinsic to self-identity, as it reflects an individual's self-assessment across various domains such as personality traits, values, and roles in different contexts (e.g., family, work, society).

In contrast to the other options, which focus on external perceptions or aspirations, the correct answer emphasizes the internal understanding an individual possesses about themselves. This makes self-concept a fundamental part of psychological well-being and self-identity, influencing behavior, motivation, and how one interacts with the world. The other choices, although related to identity, either reflect external perceptions of individuals or aspirations that might not necessarily align with the individual's true self-perception.