The most likely reason the author uses the word “sing” in the title of the poem is: 2. To Show that the speaker view himself as a legitimate voice in America.
<h3>The Theme of the Poem</h3>
In the poem, "I, Too, Sing America" Langston Hughes brought attention to the discrimination faced by the black people in America.
Just as singing can be regarded as a legitimate way of expressing oneself, the poet regarded himself as a legitimate voice that should also be heard in America.
Learn more about "I, Too, Sing America" here:
brainly.com/question/14995766