Final answer:
In the first excerpt, Buck is hesitant and unsure about mushing, but in the second passage, he has adapted and developed a sense of purpose and pride in his work. This change reflects the theme of the value of work.
Step-by-step explanation:
In the first excerpt from The Call of the Wild, Buck is introduced to mushing for the first time. His response in this passage is one of confusion and surprise. He is hesitant and unsure about the sled and the commands given to him. However, in the second passage, Buck's feelings about mushing have changed significantly. He has adapted to the harsh conditions and physical demands of mushing and has become a skilled sled dog. He now enjoys the challenge and feels a sense of accomplishment and pride in his work.
This change reflects the theme of the value of work. Initially, Buck is unfamiliar with mushing and is resistant to it. But as he becomes more experienced and skilled in his work, he develops a sense of purpose and satisfaction. Through his hard work and determination, Buck not only survives in the harsh environment but also thrives. This highlights the importance and value of work, as it provides a sense of purpose, fulfillment, and growth.