Which part of the mind uses reasoning in decision-making?

The part of the mind that utilizes reasoning in decision-making is the Ego. In Freud's psychoanalytic theory, the Ego acts as the rational component of the personality, mediating between the desires of the Id, the moral standards of the Superego, and the realities of the external world. It employs logical thinking and realistic strategies to satisfy the Id's impulses while considering the constraints imposed by the Superego and the environment. This ability to reason allows the Ego to make decisions that are not only satisfying to the individual’s desires but also socially acceptable and practical.

The role of the Ego highlights the importance of higher-level cognitive functions in ensuring that decisions are balanced and informed. By using reasoning, the Ego helps navigate complex situations and conflicts, ensuring that actions are appropriate and not purely driven by instinct or moral judgments.