Thank you for the posting of the question however it seems that there is no sense to this question. can you read the question yourself and determine if someone else without your paper/computer screen can interpret this reasonably well? is this even english question
I think they add mood and other text features.
Because it will teach you about interesting things you didn’t know about before
This dire feeling was inspired by the sight of the House of Usher itself. The excerpt is from the very first paragraph of the story, at which moment we have no idea who the Ushers are, what's wrong with their house (or them), or even who the narrator is. We just get to find out how it made him feel. It infused him with gloom, bleakness, and depression so great that he couldn't comprehend it or understand its cause. This feeling has two functions: it foreshadows that something bad is about to happen at this house, and it builds suspense by signaling to the reader that the house itself is haunted or cursed in some other way - almost as if it had a soul and will of its own.
