Audience-centeredness means that public speaker should

Public speaker should be able to influence the audience .They shall make audience connected with them.It is said that it doesnt matter how deep you speak, how great speaker you are but if your words are not delievered to your audience then your efforts go to vain.So your tounge should be able to deliever message of your heart to your audience

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.