Which excerpt from the call of the wild provides story details that would likely be absent if Buck were the narrator

"Dave refused to run quietly on the trail behind the sled, where the going was easy, but continued to flounder alongside in the soft snow, where the going was most difficult, till exhausted."

Explanation:

'The Call of the Wild' is a short adventure novel penned by Jack London. The novel is narrated from a very atypical point of view i.e. dog. However, the Buck's consciousness could not relate to the readers, thus, Noel Gaulin(a human character) is opted to narrate Buck's perspective.

As per the question, the excerpt 'Dave...exhausted' offers details of the story which could be absent if Buck would be narrating the story. The key reason behind is that it shows the strength of Buck that he displays to adjust to the cruel realities of the life at Frosty North.