Which of the following best defines 'morals'?

The correct definition of 'morals' is rooted in beliefs that are shaped by an individual's personal ideas regarding what is right and wrong. Morals are essentially the principles that guide behavior, helping individuals discern ethical actions from unethical ones. They encompass personal values and can be influenced by cultural, religious, and philosophical factors.

In contrast, societal rules based on laws pertain to legal systems that govern behavior in public life, which are not solely founded on personal beliefs. Individual opinions on health and fitness focus on personal judgments rather than ethical considerations. Common practices in sports refer to the norms and regulations that occur within a specific domain, which do not necessarily reflect a person's moral beliefs. Thus, the definition that highlights personal beliefs about right and wrong is the most accurate representation of 'morals.'