Final answer:
Walt Whitman uses the structure of the poem to present a natural, conversational rhythm and capture the diverse voices and occupations of American workers.
Step-by-step explanation:
Walt Whitman most likely uses the structure of this poem to present a poem with a natural, conversational rhythm. By using a free verse form and varied line lengths, Whitman captures the diverse voices and occupations of the American workers he portrays. The absence of a traditional rhyme scheme allows for a more fluid and organic expression of the workers' songs and enhances the realistic tone of the poem.
Learn more about Structure and style of Walt Whitman's poem 'I Hear America Singing'