The answer is option 1: Simile.
A simile is a figurative language or a metaphor that uses comparisons to describe an event, someone, a place, etc. It aims to make the writing more colorful and interesting. We can normally identify a simile because it uses "like", "as" and "as in" in the sentence.
In this case, we know for sure that the narrator describes ice skating using a simile since it describes it by comparing it with another action "is like jumping on a moving merry-go-round."