Answer:
The excerpt mirrors what happens in the rest of "The Fall of the House of Usher because A. The narrator constantly struggles between a dreamlike state and reality
Step-by-step explanation:
Poe gives a dreamlike feeling to the story from the very beginning, when the narrator contemplates the house for the first time and it feels like the after-dream of the reveller upon opium. The continouos allusion to dreams also complicates whether the sounds, scratchings and the other fantastic testimonies that Rodrick tells him are real or a product of this struggle between dreams and reality. it turns him into an unreliable narrator.