Explanation:
While the main idea is usually in the first sentence, the next most common placement is in the last sentence of a paragraph. The author gives supporting information first and then makes the point in the last sentence.
Answer:
An unnamed narrator approaches the house of Usher on a “dull, dark, and soundless day.” This house—the estate of his boyhood friend, Roderick Usher—is gloomy and mysterious. The narrator observes that the house seems to have absorbed an evil and diseased atmosphere from the decaying trees and murky ponds around it.
I think a. use of verb tenses
"think"
