Though the passage is not provided, the resolution that takes place at the end of the story signifies the narrator's realization of not wanting to live in seclusion, and tear's apart from the yellow wallpaper (assuming she is freeing a lady trapped behind it) and starts creeping on the floor, imitating the free woman, and ultimately climbs upon her unconscious husband, signifying she raising above him.
The story expresses a woman's trapped feelings after giving birth to a child. Her helpless and disorientation of a new phase of life, with a grand responsibility which she has to take up, rearing a child.
In the story, the narrator is found to be undergoing postpartum depression, and how her husband denies her to indulge in things she wishes to do as a course of treatment, as he thinks she has hysteria tendency.
However, remaining in seclusion is doing more harm than treating her, and she starts hallucinating that there is a woman trapped within the yellow wallpaper of the room.
She free's the woman in the end and expresses her own freedom to her husband and climbs over him as he faints and expresses her victory over him.
What about 'displease'? That works. :)
I must always obey to my parents.
I mustn't steal anything from anyone.
You didn't give any choices so I am just going to give an example of a formal tone sentence:
Thank you for sending that package.
As you can se the person who wrote this is talking seriously in a formal tone.