The green knight expects Gawain to keep his word. He expects Gawain to show bravery, one of the most high values of chivalric. This is shown when he says "come then,or you will rightly be called coward."
Answer: The correct answer is : The green knight is a warrior who defies the court of knights of King Arthur, is a terrifying and intimidating figure. The value that the green knight that Gawain shows, is the valetía. The text that supports it is, "come then, or you will be called a coward."
