The only thing on there that actually made sense was the Dry:Air, but flood doesn't mean air. :/
I say a because A because my sister read the book.
The people will have journeyed to the center of the earth. I think this because it is the title. This is fantasy because the center of the earth is too hot to travel to. The people will probably get burnt next.
The tone of The Great Gatsby veers between scornful and sympathetic, with caustic scorn gradually giving way to melancholic sympathy toward the end
