Which of the following statements best reflects the impact of peer influence on personality development? Select one: 1. Peer influence only affects behavior, not core personality traits. 2. Peer groups have no effect on personality after early childhood. 3. Peer influence can significantly affect traits like agreeableness and conformity. 4. Peer influence is the sole determinant of personality in adolescence.

The correct answer is:<br /><br />3. Peer influence can significantly affect traits like agreeableness and conformity.<br /><br />Explanation: Peer influence plays a crucial role in shaping personality traits, especially during adolescence. While core personality traits are primarily established early in life, peer groups can significantly impact the expression of these traits and the development of additional traits such as agreeableness and conformity. Peer influence is not the sole determinant of personality but is a significant factor that interacts with other influences such as family, culture, and individual experiences.