Question

What effect does Hughes achieve by repeating the phrase "does it" in "Harlem"?
Short words and hard consonants create a sense of angry uncertainty.
Short words and questions demonstrate Hughes's confidence.
The repetition creates a sense of peace and serenity for the reader.
The repetition highlights Hughes’s feelings of self-respect.

Answer 1

Short words and hard consonants create a sense of angry uncertainty.

The repeated "Does it" turns each line into a sharp, insistent question, building rhythm and tension and conveying anxious, mounting frustration (ending in the violent "explode").