What unified effect does Poe strive for in this story and how do the different elements-setting action characters and dialogue-contribute to that effect?

Poe aims to create a sense of suspense and dread throughout the story, building tension as the narrator descends into madness. The elements of setting, action, characters, and dialogue work together to enhance this effect by creating a dark and foreboding atmosphere, portraying the narrator's mental unraveling, and highlighting the eerie and unsettling interactions between characters. Together, these elements contribute to a sense of unease and psychological Horror that permeates the narrative.