How can authors use of setting build tension within a story?

With the extra income, the bookers moved to a housing project. "loveman's village was brick," wash said, "and it was warm and well lit. there was a bathtub. it had hot and cold running water. there was a gas heater with a thermostat that came on whenever it got cold." how does this excerpt readers make a personal connection to the story?

My dog sleeps beside my bed he wakes me up in the middle of the night to let him out. complete, run-on sentence or comma splice

Which tone best fits a business letter