The theme that is developed in paragraphs 31-35 of "The Call of the Wild" by Jack London is there is a special bond between man and dog.
This theme of the special bond between man and dog is central to the novel and is exemplified in these paragraphs as Buck and Thornton's connection grows stronger amidst their challenging journey.
In these paragraphs from The Call of the Wild, the story focuses on the relationship between the protagonist, Buck and his human owner John Thornton.
Buck has developed a deep and loyal bond with Thornton and the paragraphs describe how they rely on each other for companionship and survival in the harsh wilderness of the Yukon.
Therefore, the Option B is correct.