Which sentence contains a conjunction?
save a quarter for the parking meter.
i didn’t know so many people would attend.
they hadn’t seen the movie, yet they knew every song.
she enjoyed both movies.

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.