The answer is <u>the first sentence of the paragraph</u>, the hook of an introductory paragraph can be included in any part of the first paragraph, does not need to be the first sentence
The states benefited each other with defense, goods and trading
The parts of Edgar Allan Poe's excerpt "the fall of the house of Usher" that bring out gloomy and oppressive mood would be the part the narrator found out that usher got a mental illness. Usher begged his friend to come and see what's wrong with him.
hope this helps
