He incorporates it to reflect a blues musical timing.
A signature of Hughes's poetic style is his meter. It reflects the rhythms of Harlem's jazz and blues during his time period, as well as black folk rhythms. Hughes's poetry is reflective of the African American culture in, not only its content, but also its rhythms.
The other two options are simply incorrect. He did not writing jingles for depression medication has nothing to do with how he incorporates meter. While the first does indicate the blues sound, it's not completely correct.
Number 2 is correct because this is an appositive sentence structure, which means one sentence is interrupted by another.
Hope I helped!
Doesn't he think that he hears the heart beating under the floor board?
Because he hears this faint beating leaving him to be paranoid that the cops know that he hid that guy under there.
