Incredibly describes essay. Insightful also describes essay, making them both adjectives.
F.Why and I would also say D what. For example if you would predict that a pig is pink for example. What: I predict pigs are pink. Why: here you would have a reason.
Both speaker and poet have a dark mind that proves to be insane and makes the mood and atmosphere dark, terrifying
The first involves the purchase of a new dress, and the second involves borrowing the jewelry she feels is needed to accompany it. It is only after she has borrowed the diamond necklace from Madame Forestier that she feels she can make a suitable appearance at the ball.