What’s the conflict and the solution in Call Of The Wild?

The main conflict in this story is Buck's fight against a series of masters who take the loving, domesticated, family pet and begin his transformation to the wild animal he will become.

The story's climax occurs when John Thorton rescues Buck and a true bond is re-established between Buck and a human. As for a solution or resolution, this occurs when John Thorton is killed, and Buck no longer has any emotional ties..... he is then free to return to the wild.