Final answer:
The green girdle in the story becomes a symbol of deception and temptation.
Step-by-step explanation:
The green girdle in the story represents D. Deception and temptation.
The green girdle is given to Sir Gawain by Lady Bertilak as a test of his loyalty and integrity. However, Sir Gawain is tempted by the girdle's magical powers and decides to keep it a secret from his host, Lord Bertilak. This decision leads to deception and betrayal, as Sir Gawain breaks his promise to always be truthful and honest.
Moreover, the green girdle symbolizes the human experience of temptation and the struggle to resist it. It serves as a reminder that even the noblest and most honorable individuals can be susceptible to deception and temptation.