Write a brief short description in about 3 to 4 lines on the story "The Yellow Wallpaper."
Unfortunately, for me to log an approved response I need to do at least ninety words, so I won't be perhaps giving you the short answer that you are looking for! However, if I were you I would review the entire short story and try and approach this task in the following way. Introduce the main character and the setting in the first sentence. Include the progression of the plot in the second and third sentence and then in the final sentence mention how the story is resolved. Having a framework like this might help you structure your response might help you structure your question.
"The Yellow Wallpaper" therefore is a first person narrative based on the experience of a woman suffering depression after the birth of her child. For her own good, her husband confines her to a room with strange yellow wallpaper that the narrator becomes increasingly obsessed with. Eventually the narrator imagines she sees a woman behind the first "layer" of the wallpaper, moving around and shaking the pattern as if it were the bars of a cage. The story ends when she tries to release the woman and walks around the room herself, as if she has assumed the persona of the trapped woman that she imagines, cementing her descent into insanity.
This is just an example but I hope this gives you an idea of what you can achieve. Good luck!