Final answer:
The knights of the round table honor Gawain after his final encounter with the Green Knight by wearing a green sash as a symbol of solidarity and admiration.
Step-by-step explanation:
After Gawain's final encounter with the Green Knight, the knights of the round table honor him by wearing a green sash as a symbol of solidarity and admiration.
This green sash represents Gawain's courage and integrity in facing the Green Knight's challenge. By wearing the sash, the knights show their respect and recognition for Gawain's bravery.