Final answer:
Insanity is a recurring theme in Gothic literature, showcasing characters' struggles with psychological fragility and madness induced by societal pressures or supernatural elements.
Explanation:
In Gothic literature, insanity is a theme that commonly recurs. Characters often grapple with psychological fragility, hallucinations, and madness induced by societal pressures or supernatural elements, as seen in works like Edgar Allan Poe's tales or Mary Shelley's Frankenstein.
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