What is the scope or range of ethics? Are the preferences of nonhumans included in the "good life" that is possible? Why or why not?

Explanation:

A)The scope of ethics includes whatever has reference to free human acts, whether as principle or cause of action (law, conscience, virtue), or as effect or circumstance of action (merit, punishment, etc.)

B)The province or scope of Ethics is the range of its subject-matter. Ethics, as a normative science, seeks to define the moral ideal. It is not concerned with the nature, origin or development of human.

Moral equality theories extend equal consideration and moral status to animals by refuting the supposed moral relevance of the aforementioned special properties of human beings.  Arguing by analogy, moral equality theories often extend the concept of rights to animals on the grounds that they have similar physiological and mental capacities as infants or disabled human beings.