Why do writers use appositives in their writing

An appositive (or an appositive phrase) gives more information about a noun. The appositive is usually placed next to the noun it modifies. Writers use appositive and appositive phrases in order to provide more information about something. Consider this sentence: Samson, my little puppy, tore the pillow apart. Here, the phrase "my little puppy" is an appositive phrase that tells us more about the noun "Samson." Thanks to the appositive phrase, the reader knows that it was a little puppy that tore the pillow apart, and not a person or other animal. Therefore, appositives are important in order to clearly convey information to the reader.

Explanation:

a biography is a genre that mainly accounts somebody's life and that is written by somebody else. this genre supports sonia nazario's desire to share enrique's life because she can fully inform readers of his entire emotional journey.

in a biography, an author can share the readers almost everything about a person's life, or just one key event or personal aspect the author is interested in telling, like in this specific case in which sonia nazario is centered in enrique's emotional journey.