At which level of Kohlberg’s moral development does individual’s ethical behavior mainly depends on the mindset that “what do people think of me”?

The correct option is Conventional.

Lawrence Kohlberg's theory of moral development consists of three main levels, each divided into two stages:

1. Preconventional Level: Morality is externally controlled. Individuals make decisions to avoid punishment or earn rewards based on self-interest.

2. Conventional Level: Morality is tied to personal and societal relationships. Individuals accept and internalize social rules and expectations. In Stage 3 (Good Interpersonal Relationships) of this level, often referred to as the "good boy-nice girl" orientation, moral behavior is driven by the desire for social approval, pleasing others, and caring about "what people think of me."

3. Postconventional Level: Morality is defined in terms of abstract principles and values, such as justice, human rights, and social contracts, independent of external approval.

Therefore, when an individual's ethical behavior mainly depends on concern for public perception and social approval ("what do people think of me"), they are operating at the Conventional level of moral development.