I think the correct answer is D after I read many sources because paper is not a contribution if the ancient Mesopotamia.
And last, this would cause a great deal of air pollution. Trees are the ones that are helping taking in our carbon dioxide, and now we're releasing even more into the air now. In the end, fires may cause a catastrophic ecosystem.
Creating tension will immerse the reader into the story and evoke emotions that will allow him or her to relate to the characters. It also helps to build up to the climax.