Answer: B. fábulas.
Me gusta leer fábulas porque dejan una enseñanza o moraleja al final.
I like to read fables because they leave a lesson or moral at the end.
Explanation: The fables are fictional stories, which have an educational purpose and feature animals, which are personified (given human qualities, such as the ability to speak human language) and illustrate or lead to a particular moral lesson (a "moral"), which can be added at the end explicitly, as a concise maxim or said.
