Answer:
B. Diverse people contribute to the country's identity.
Step-by-step explanation:
Walt Whitman's poem "I Hear America Singing" talks about the diverse professions that make up the whole American identity. The poet describes the various "carols" that constitute the nation of America.
As seen in the given poem, Whitman mentions how the various professions, be it "mechanics", "masons", "carpenter", "boatman", "shoemaker", "mother" etc all contribute to the harmonious melody in the singing. Through their respective professions, they all sing about their works which shows the united nature of the various people of the country. Through the depiction of the different professions, Whitman emphasizes the interconnectedness of the diverse people that contribute to the identity of the great nation of America.
Thus, the correct answer is option B.