Final answer:
In Gawain's speech in Arthur's Court at the end of part 4, he upholds his part of the bargain but falls short of upholding all the values of the pentangle.
Step-by-step explanation:
In Gawain's speech in Arthur's Court at the end of part 4, he does uphold his part of the bargain by facing the Green Knight and accepting the challenge to be struck on the neck with an axe in exchange for a return blow a year later. However, he does not fully uphold the values of the pentangle. The pentangle represents various virtues, including fidelity, uprightness, fellowship, purity, and courtesy. Gawain's actions throughout the story show that while he strives to uphold these values, he is not perfect and falls short at times. For example, he accepts the girdle from Lady Bertilak as a means to preserve his own life, which goes against the value of fidelity. However, his realization and confession of his mistake at the end of the story show his growth and commitment to upholding those values despite his imperfections.