Which play by Tennessee Williams explores themes of mental instability?

The choice of "A Streetcar Named Desire" as the play that explores themes of mental instability is well-founded. This work centers on the character of Blanche DuBois, who struggles with her emotional and psychological stability throughout the story. The play provides an intense portrayal of her descent into mental instability, deeply influenced by her traumatic past, including the loss of her family estate and the death of her husband. Blanche's mental state progressively deteriorates, culminating in her breakdown towards the end of the play.

Williams employs various dramatic techniques to illustrate these themes, including symbolic elements such as light, which represents truth and reality, contrasting with Blanche’s preference for dim lighting to mask her past and present. The interactions between Blanche and other characters, particularly Stanley Kowalski, further highlight her fragile mental state, showcasing the devastating effects of societal rejection and personal loss.

While the other plays mentioned also explore complex themes and character dynamics, they do not delve into mental instability with the same intensity or focus as "A Streetcar Named Desire." For example, "The Rose Tattoo" centers on themes of love and loss, while "Cat on a Hot Tin Roof" addresses issues like mendacity and familial tension. "The Glass Menagerie" also touches on emotional struggles but