Which of the following statements would best state the main theme of the call of the wild?

1.)true courage cannot be learned.
2.)have faith in the values of humanity
3.)it id better to be clever then strong
4.)we are driven by our ancient animal instincts

The correct option is: 1.)True courage cannot be learned.

While it is true that throughout his career Jack London (1876-1916) treated a wide variety of issues, "the part of his most characteristic work, especially in regard to their stories, is that corresponding to the experiences accumulated during his stay, in the winter of 1897, in the Klondike region, where he arrived swept away by the gold rush that at that time attracted hundreds of thousands of Americans to Alaska, as did "White Fang", THE CALL OF LA NATURALEZA (1903) and BTARD (1902), correspond to this series and are among the most well-known of the author, both protagonists by dogs and masterful in their genre, these stories from London transport us to a primal world, "perhaps less remote of what we would want from our own civilization."

"silence" is the answer to this riddle.