Answer:
The correct answer is option B. "Imagery".
Step-by-step explanation:
Walt Whitman was an American poet, essayist, and journalist considered the father of free verse, breaking the rules of poetry by using freedom to express his ideas. Instead of using rhyme and meter in his poem, Whitman used long and unrhymed lines. Given that Walt Whitman did not write using rhyme and meter, he liked to use imagery to emphasize certain ideas in his poems by writing comparisons and metaphors.