In the short story, "The Cask of Amontillado," Poe's use of a(n) ___________ narrator to tell the story heightens the uncertainty and sense of horror felt by the reader

unreliable

how do you know

I know this because the narrator, Montresor, is revealed to be deceptive and manipulative throughout the story. He portrays himself as a friend to Fortunato, all the while planning and executing his murder with cold determination. Montresor's actions and motives are not fully explained, leaving the reader to question his reliability and sanity. This ambiguity adds to the overall sense of unease and suspense in the story.