B. Diverse people contribute to the country's identity.
Explanation:
Walt Whitman's poem "I Hear America Singing" is about the contributions of diverse groups of people for the making of America. Whitman details and includes the various working class people doing things in their own ways for the nation. Celebrating the common American worker, he puts the spotlight on those unseen workers who all contribute in their own ways for the making of this nation. Though they may seem insignificant, they all played a huge part, singing their own sings and doing whatever they all can. Everyone is unique and contributed equally. One of the themes found in this poem is the contribution of diverse people to the country's identity.
