5. When he addresses the Knights of the Round Table, the Green Knight says that
"I come not to fight but to challenge." What do you think he means? What is the
difference between a fight and a challenge to you?

The difference of a fight and a challenge is a fight you actually fighting for something, which also means people can get hurt, and/or killed. For example, I would say, "Since you put your hand on my sister ill put my hands on you."  A challenge is someone giving you somewhat of a test. For example, I could say," I challenge you to a game of basketball".

Explanation:

Hope This Helps : )