Which definition best describes "morals"?

The definition that best describes "morals" as principles and values that guide personal conduct highlights the foundational aspects of morality. Morals encompass an individual's beliefs about what is right and wrong, which influence their choices and actions in various situations. This definition captures the essence of how personal ethics develop and are expressed in everyday life.

While the other options touch on relevant aspects of morality, they do not fully encapsulate its core. For example, referring to moral principles as the core motivator for behaviors emphasizes motivation rather than the guiding values themselves. Similarly, framing morality as the study of right action is more aligned with ethical theory or philosophy rather than personal morals. The evaluation of good and evil in human conduct points more toward a normative aspect of moral philosophy, rather than the individual principles that govern personal behavior. Thus, the choice that centers on principles and values effectively conveys the personal nature of morals in guiding conduct.