Answer:
In the excerpt, what the diction, or words used to express an idea, show about the narrator is that It makes the narrator seem disciplined.
Step-by-step explanation:
The diction or words used to express an idea in this excerpt from "A Farewell to Arms" by Ernest Hemingway shows that the narrator is discipline because everything is perfectly structured and organized not only in the selection of them but also in the grammatical form they have, it seems to be a disciplined, and organized person.