In "Hills Like White Elephants," how does setting reveal aspects of the plot?

In
Hemingway's "," the setting consists of a caf© at a train station where the woman and
man are drinking and a compelling, attractive background landscape that is dominated by hills,
which the girl describes as looking like "white elephants."

Nothing
really happens of significance, in terms of overt plot developments, but something significant
is about to happen. Whatever is about to happen constitutes the
"elephant" in the setting. Yes, there are the hills, but the figurative elephant in
the story is the surgical procedure that the woman is about to have. The characters are on their
way to somewhere, as indicated by the...