How does the man's character affect his ability to deal with the conflict he encounters in this story? To what resolution does this lead?

London points out that the man lacks "imagination". Really this means that the man lacks the proper respect for what nature can unleash. The man has this foolish pride in that he can beat nature at her own game. He lacks the ability to imagine all the things that could go wrong in this very unforgiving environment. The man fails to heed all of natures signals, including a dog who knows much better, and continues his journey thinking he has the time and perseverance to beat nature. This is his undoing. The man eventually freezes to death after a series of "mistakes" that nature is very unforgiving about.

A+ for Aslan! Yeah. Really. You're a natural bro.

David... the man dies.