Answer: D. It helps readers understand what the meaning is behind different types of figurative language.
Explanation: Each time you paraphrase something, you are repeating a thought, image, idea, etc., but expressed in a new way; this piece of "new information" about the same topic helps readers figure out the meaning behind other parts of the poem that would otherwise seem more obscure to them.
Thesis: Humans are things that live on earth and live off of other animals.
Re-statement of thesis: Humans are a complex species that dominate any parts of the world and play an important role in life. Humans learn though studding and listening from others and continue the path of success.