Concept:This is a sentence ordering question that tests logical coherence and sequence of ideas in a paragraph.
Explanation:S1 introduces ethics as a branch of philosophy.
Sentence R directly follows by explaining what ethics evaluates—relationships, rules, and codes.
Sentence Q narrows the topic to environmental ethics, a specific branch.
Sentence P then discusses the moral agency of humans, a point relevant to environmental ethics.
Finally, sentence S defines “value,” which leads naturally to S6 about inherent or conferred values.
Thus the correct sequence is R, Q, P, S.
Answer:R Q P S (Option A)