This word means anything that happens to or is done by a character in a story.

The answer is event.

Explanation:

In a story, anything that happens to or is done by a character is called event. Events can change the direction of a story, the way characters are perceived by viewers or readers, the characters' being flat or complex... A story that has shallow events might be seen as boring. Events must be significant, otherwise the audience will see no reason to receive that information whatsoever and may even give up on the story for good.

what passage is used?

the answer is: round.

in literature, round characters are considerably complex and experience or are subjected to unpleasant situations. as a consequence, they go through crucial sentimental and psychological development, which can cause surprise in the readers. in this case, juan's dramatic transformation is related to the adversities he meets at school.