Of the many symbols the hemlock tree represents, choose the one that Frost drew upon, in all likelihood, for this poem.

The hemlock tree symbolizes various themes and concepts in literature, but in the context of Robert Frost's poetry, it often represents isolation, mortality, and the beauty found in nature. In his poem "Stopping by Woods on a Snowy Evening," the imagery of the woods and the hemlock tree evokes a sense of contemplation and the allure of nature versus the obligations of life. The hemlock, with its dark and somber presence, can symbolize the weight of decisions and the creeping inevitability of death, reflecting Frost's frequent exploration of complex emotions tied to nature and the human experience. Thus, the hemlock tree likely represents a deep connection to the themes of introspection and the dualities of life and death in Frost's work.