Answer:At the end of Wide Sargasso Sea, Antoinette has a dream that she escapes from her confinement and sets the house on fire. She then runs to the battlements of the structure and jumps off. This dream acts as a parallel to the fire that takes place earlier in the novel.
Explanation: Antoinette protested at first, but without success. And then falling into despair, she had alcoholism and became numb. Later, she was brought back to Britain by Rochester and imprisoned as a madman in the attic of Thornfield. Her nervous thoroughly collapsed, and finally she set fire to the house and ended her life.