D. A copy of your high school diploma
During photosynthesis, plants take in carbon dioxide and create oxygen, which is what humans breath. So, when the human breaths in the oxygen, in the process of cellular respiration, we create carbon dioxide and it goes in a cycle.
Fantasy can be any sort of thing, it can be a dystopia, a utopia, it can even just ignore those. I dystopia is a type of fantasy where the world the character lives in is worse than the one we live in now.