Which study focuses on human conduct, character, and values?

The study that focuses on human conduct, character, and values is ethics. Ethics is a branch of philosophy that examines what is morally right and wrong, the principles that govern individual behavior, and the values that individuals and societies hold. It delves into questions about how people ought to act, the morality of decisions, and the justification for various actions based on moral reasoning.

In this context, ethics plays a crucial role in understanding the motivations behind human behavior and the implications of those actions on individuals and society as a whole. It provides the framework for discussing issues related to right and wrong, virtuous living, and moral obligation, making it the most fitting answer in the context of the question.