The poem "Dream Boogie" is about a boy. This boy asks if you have heard the boogie-woogie rumble of a dream deferred.
In this poem Langston Hughes uses the word "Daddy" in reference to "daddy-o". This terms is mainly used in the jazz era. The language used gives us the idea that the term boogie-woofie refers to a style of jazz.
Explanation: A third-person point of view can be omniscient, in which the narrator knows all of the thoughts and feelings of all of the characters in the story.
It helps define the theme by providing the contrast of a river as opposed to a town. A river is forever flowing,free, and untamed, it represents freedom. While a town has structure, and rules, and ways in which is must 'act'. This represents slavery.