Final answer:
The Fall of the House of Usher and The Tell-Tale Heart share similarities in the theme of madness and the use of a dark setting to create a sense of horror.
Step-by-step explanation:
The Fall of the House of Usher and The Tell-Tale Heart, both written by Edgar Allan Poe, share several similarities. One similarity is the theme of madness and psychological deterioration in the main characters. In both stories, the narrators are plagued by their own unstable mental states, leading them to commit heinous acts.
Another similarity is the use of a dark and eerie setting to create a sense of dread and unease. The House of Usher and the old man's house in The Tell-Tale Heart are described in detail, with their decaying and oppressive atmospheres heightening the sense of horror.