It's an opinion because it is a belief based on the perspective that the government should be involved in stopping the extinction of animals.
Answer:
A. "The world... will never forget what they did here."
Explanation:
The emotional appeal of this passage is that "they" (probably the Confederates) committed an atrocity so great that the entire world will remember its scope. None of the other passages really do anything to appeal to the audience's emotions for lack of phrases that can do so.
The only word I'm seeing that could be an adjective is the word "old".
(Correct me if I'm wrong, thanks!)
Have a great day!