Which sentence uses the correct form of the verb do?
a.
her friend has done all of the decorations.
b.
her friend has did all of the decorations.
c.
her friend has do all of the decorations.
d.
her friend has does all of the decorations.

alright no problem, cool

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.