Answer:
it is a convincing argument because of the several examples. It was a good idea to compare conflict with animals, which we are similar to and how they do it often with attacking, but at a grand scale.
The answer is an adverb clause because "have been" is considered an adverb clause...
The correct answer is B, nature.
They were actually opposed to all these other options, to order, hierarchy, and discipline, but valued nature as the greatest inspiration in their lives.