Answer:
The animals are not forced to work on Sunday if they do not want to, but if they do not volunteer, then their food rations are cut in half. The irony being that they really have no choice in the matter, as they are punished with their food rations if they do not work.
Explanation:
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.
You need to use the comma no