Final answer:
The theme of "The Yellow Wallpaper" is that keeping one's mind active is good for mental health.
Step-by-step explanation:
The theme of "The Yellow Wallpaper" is that keeping one's mind active is good for mental health. In the story, the narrator's mental health deteriorates as she is confined to a room and forbidden to engage in any stimulating activities. This theme is illustrated through the use of the yellow wallpaper as a symbol of the narrator's deteriorating mental state.
Learn more about Theme in literature