Need help with 18,19,and 21

I would appreciate it

In a short summary, describe the progression of roderick usher’s mental and physical deterioration over the course of the story. in your opinion, what brought on his illness?

When should you use encyclopedias such as wikipedia? a. never, it is not appropriate to use this source in college b. it can you get an overall understanding of the subject matter but is not considered a college-level source c. as long as wikipedia isn't the only source, it is always appropriate to use this source

Which event in chapter 3 seems like it will be the climax of mice and men