Final answer:
Metaethics is the domain of ethics that would most likely address the question about the relationship between ethics and divine authority.
Step-by-step explanation:
The question falls under the domain of metaethics, which focuses on moral reasoning and foundational questions. Metaethics explores the origins of moral values, the meaning of moral terms like 'right' or 'good', and the psychological basis of moral judgments. It attempts to understand the assumptions underlying moral beliefs and practice.