Final answer:
Nonfiction is not a subgenre of fiction, while fantasy, mystery, and science fiction are subgenres of fiction.
Step-by-step explanation:
The correct answer is nonfiction.
Fiction is a genre that includes stories that are made up or imagined, while nonfiction refers to writing that is based on facts and real events. Therefore, nonfiction is not a subgenre of fiction.
On the other hand, fantasy, mystery, and science fiction are all subgenres of fiction. Fantasy involves imaginary elements such as magic or supernatural creatures, mystery focuses on solving a crime or puzzle, and science fiction incorporates scientific or technological advancements.
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