GMAT Sentence Correction (SC) | Re: For Ralph Waldo Emerson, transcendentalism was his professed

c) launched with Rachel Carson’s Silent Spring; he outlined his beliefs in his essay, “Nature,” which argued that man does not fully accept nature’s beauty and all that it has to offer.

in the correct answer, how can it refer back to nature? can it refer to something in quotes? I thought GMAT does not allow a pronoun to refer to a possessive. Please clarify. Thanks