The use of,' “the bubbles,” “Colonel Shaw” and the “Monuments” are symbolic. They depict the poet's intention. Bubbles are associated with the fragility and the temporary nature of their life.
In the poem, the symbolic element refers to impossible dreams and existence. It further explores the themes of self-sacrifice, self-interest, greed, and idealism by contrasting the past and present. The poem is set in Boston, near Robert Gould Shaw Memorial.
Therefore, the correct answer is as given above.
learn more about symbolism: https://brainly.com/question/15816956
#SPJ1