Much of hemingway’s work indicates his obsession with
-relationships
-future justice
-death
-choices

The answer is death.  The best of this is in his work The Indian Camp.  It was not just death where his stories centered on.  Hemingway also wrote several stories that embody themes of greed, apathy, cruelty, hunger, tenderness and love among the others.  Many of themes were influenced by many experiences that he had in his life.

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.

fond of fighting is the answer