Step-by-step explanation:
If you look at the word "endless" at the sentence, it is exaggerated.
There is no possible way that the stories told of Wonder Horse would be endless/forever.
Simile is using the words "like" or "as"
Hyperbole is exaggeration of a sentence
Personification is the use of human movement/actions of something that is not living or human.
Imagery is the use of words creating an image to the reader's mind.
You should be able to know which answer you should choose now!