The correct answer is - gloom and despair are ever-present dangers.
The narrator of The Fall of the House of Usher has known Usher and his sister since they were children. They used to be very good friends until the narrator moved. Many years after, the narrator decided to visit his old friend and he saw that his house was falling apart. He found out that the sister had died and that Usher was slowly going mad. After a while, it turned out Usher killed his sister, having forced her into a coffin alive until she smothered.
