What role does the exposition play in plot?

Which of the following best summarizes the entire passage

Which of the following passages from the book best represents the author's use of symbolism? a. the photograph taken of the young enlisted men representing the horrors of war b. woody's mustache representing the government's hidden rules and regulations c. papa's fishing fleet representing his interrogation experience in the south dakotan military facility d. the large empty expanse of the firebreak representing jeanne's feelings of separation from her parents

Consider tim o’brien’s story "ambush." what differences do you see between how o’brien dealt with killing an enemy soldier in the moment of battle compared to looking back on the moment later in life? what might this contrast reveal about the effects of war?