Which of the following is an example of a short story genre?

The correct answer is D. Thriller.

A short story is a brief fictional narrative, and the thriller genre is known for its suspenseful and engaging storytelling. While encyclopedias, textbooks, and biographies provide information or factual accounts, thrillers are specifically designed to entertain and evoke strong emotions, fitting them within the realm of short stories. If you have any further questions, feel free to ask!