Answer:
B. participles
Explanation:
Participles are words created from verbs, that are used as an adjective. For example, the word winning is a verb. But in this sentence, "The winning competitor wins the trophy." the word winning is used to describe someone and not necessarily just the action they have participated in.
He tells Percy the story about the tree and a girl named Thalia. The story was that Thalia, Annabeth and other half bloods where exploring outside of the half blood camp. But then monsters came out of nowhere and started fighting them. They tried to fight the monsters but they weren’t strong enough. So Thalia protected them and risked her own life to save them. But thalia died and Zeus her father grew a tree in her honor, and the tree provided a barrier for the camp to keep them safe. :-)