D. Catalyst
A catalyst is a reason for an event to occur.
There are several ways you can think about this split—the wild vs. the domesticated, the free vs. the enslaved, the rugged individual vs. society, the genuine vs. the artificial. I think the message of the poem, however, has to do with freedom of expression and the need to be independent of corrupting social influences
I wonder....if this is a multiple choice question? If not I believe the monster represents the societal fear of illness and disease.
