How is naturalism reflected in "A Man Said to the Universe"?

Naturalism often portrays people as small and powerless in a vast, indifferent world. In the poem, the man declares that he exists, but the universe responds that this fact creates no sense of obligation toward him. That dismissive reply presents a cynical view of humankind’s significance, matching choice C. The response does not specifically describe Darwin’s theory of natural selection, so D is too narrow.

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