Why does buck from the novel the call of the wild refuse to be harnessed to the sled?

Need this asap what would be some of the drawbacks of using a specific dramatic structure such as freytag's pyramid?

Even the insistent cough of the woman next to him wasn't enough to draw his eyes away from the tiny type of the ancient book its pages were brittle and felt like they could crumble at the slightest disturbance he noticed the musty odor if each page as he carefully it over.

Which sentence in this excerpt from leo tolstoy’s the death of ivan ilyich suggests that ivan ilyich felt his family and friends didn’t understand him and neglected him?