Which word signifies a set of principles regarding goodness, propriety, or justice?

The word that signifies a set of principles regarding goodness, propriety, or justice is "right." This term encompasses a broad range of ethical concepts and moral principles that guide behavior and decision-making. When discussing issues of what is considered good or just, "right" typically refers to the ideals that individuals or societies strive for in terms of fairness, equality, and moral integrity.

In contrast, the other options have their own distinct meanings that do not fully capture the essence of guiding principles in a moral sense. "Wrong" denotes behavior that is contrary to ethical or moral standards, representing the opposition to what is deemed "right." "Fair" relates specifically to the concept of justice, focusing on the impartial and equitable treatment of individuals, but it does not holistically represent the broader principles of goodness and propriety. "Legal" pertains to adherence to laws and statutes, which can sometimes differ from moral or ethical considerations. While laws can align with moral principles, they are not inherently synonymous with them. Thus, "right" is the most comprehensive term in this context.