Which idea does the author develop with the text example
cited in the excerpt?
The Grimms found stories that express real-life
situations
The Grimms embellished stories with more details in
their final editions.
The Grimms wanted to stick to oral reports of folk tales.
The Grimms changed stories to be less dark in the final
edition.

i'm sorry i don't understand the question.

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.

isn't this axel talking to his uncle?

the following what exactly?