Final answer:
Details such as eerie environmental descriptions, unsettling sounds, and supernatural implications, alongside narrative tension, make a house spooky in literary texts.
Step-by-step explanation:
The key details that make the house spooky in various literary passages include descriptions of the environment, unsettling sounds, and the implication of supernatural occurrences. Details such as the dark and soundless day, murky House of Usher, and the haunted atmosphere contribute to the spooky setting.
Moreover, tactile sensations like the croaking of frogs, fluttering of swallows, and whispering wind intensify the eerie mood. The sense of dread is amplified by narrative tension, often through the character's fearful experiences, such as encounters with sheeted spectres or an unseen presence that haunts the house.