My advisor, mr burns, is me apply for scholarships specific to students who major in astronomy, the study of the universe identify the appositive phrase

the study of the universe

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.

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