What is the main purpose of "falling action" in a story?

the falling action is where the intence part of the story starsts to slow down

so the story tells of someone named kaushik choudhuri, but he does not narrate the story, a girl named hema does. hema tells the story in a second person point of view because you (the reader) are supposed to be the boy named kaushik.

here's an excerpt i found: "i was ushered into the fitting room, your mother watching approvingly as i took off my coat and sweater and tried on the bra."

source:

small european communities with shared traditions consolidated into large new states (apex)