How is the landscape's being broken up important? Ernest Hemingway's "Hills Like White Elephants"

In
Hemingway's deeply significant story, the division of the landscape takes on a symbolic meaning
as the two main characters' dialogue develops.  For, it represents the isolation of the couple
from the rest of the world in their personal discussion as well as the division between the man
and Jig in their thinking.  In the opening paragraph, things in the physical
environment have counterparts.  For instance, the hills are two in number; they are sunny on one
side and shaded on the other. The shady side has no life, while the other side the land
contains much life:

Across, on the other side, were fields
of grain and trees along the banks of the Ebro....The shadow of a cloud moved acress the field
of grain and ...the river through the trees.

Clearly,
the land that...