4)What kind of narrator is used in this piece? Is he reliable? Speculate as to why Poe would use this type of narrator for his work.

Poe uses a first person narrator in "The Fall of the House of Usher." A First person point of view is told from the narrator's perspective and the reader's knowledge of the story is limited to the narrator's knowledge. I think the narrator is reliable to a degree. Because we only see his side  we cannot know everything that is going on. If it had been told in third-person omniscient we would know everything, including the feelings of all the characters which would help  us better understand what is actually going on. I feel that Poe used first person narrative so that the reader would have to draw their own conclusions of the story instead of being told exactly what is going on. It adds to the suspense and mystery of the story and makes it more interesting and unnerving.