Based on these thoughts, which thesis statement would be most appropriate for a literary analysis of themes within the novel? Based on what happens to Buck within The Call of the Wild, a major theme within the novel is "only the strong and smart survive the wilderness." I agree with this theme.
Buck must learn to adapt with each new lesson he learns within the wild. This makes "only the strong and smart survive the wilderness" a major theme within The Call of the Wild.
In The Call of the Wild, Buck faces many challenges. These challenges show that "only the strong and smart survive the wilderness," and this is a major theme of the novel.
Clearly, as evidenced by events within the passage, a major theme of The Call of the Wild is "only the strong and smart survive the wilderness." Buck learns this lesson the hard way.