Answer :
Final answer:
The harness symbolizes Buck's obedience to serve Thornton, representing his transition from wild to domesticated and his adaptability for survival in the harsh environment.
Explanation:
The symbolism of the harness for Buck in the excerpt is best described as c) Buck's obedience to serve Thornton. This is evident in the passages that depict Buck's transformation from a wild and ungoverned nature to one that is content to be led and trained. The harness represents the restraint and guidance necessary to temper Buck's untamed instincts, facilitating his transition into a loyal and obedient sled dog, especially in his service to Thornton.
Moreover, the passages highlight a theme of adaptability and survival, as Buck learns to submit to the harness's control to live and thrive in the harsh conditions of the Klondike. Through the harness, Buck also demonstrates his capacity for loyalty and his evolving relationship with his human companions, particularly with Thornton who represents a nurturing force amid the brutal environment.