The author includes this excerpt in the falling action to clarify the resolution. contrast with the resolution. make the reader question the resolution. make the reader satisfied with the resolution.

Contrast

Explanation:

The falling action is the part in a story after the climax but before the final end or outcome, also known as resolution. In a story characters decide or are forced to take action, hence allow for change. To clarify, question and to be satisfied with a resolution are actions that generally take place after the resolution.

as for symbolic actions, the narrator's tearing down the wallpaper in an attempt to find the "woman" in the wallpaper represents her struggle to retain or regain her sanity.   the wallpaper has been part of her confinement and by her tearing it down, she is freeing herself from that confinement.

i think the literacy device is "it's frozen head"