Answer:
the best way to vary a sentence is to use prepositional phrase. this question is tricky, though, because it just says "identify a prepositional phrase" which is different from using one. Using compound sentences is a great way to vary the sentences in a paragraph, but again this deals only with one sentence. I hope this helped, and good luck man.
Explanation:
part a
the struggle of survival
part b.
and the wolf that shall keep it may prosper but the wolf that shall break must die
Help with what where is the question