In to build a fire, the character who is facing the conflict in Jack London.
The The type of conflict he is facing is both, external and internal. This is because the external conflict in the story is the man's struggle with nature. The internal struggle is within the man himself.
The problem the character is struggling against is that He doesn't realize (or does in fact realize but does not pay attention to) the danger that he is facing.
He is unable to build a fire to stave off the cold and dies because of it.
They could have solved this problem by paying attention to the danger and the consquenses.
The First Apparition tells an eager Macbeth that he should fear Macduff, saying "beware Macduff; / Beware the Thane of Fife...." The Second Apparition reassures Macbeth that "none of women born / Shall harm Macbeth" and the Third Apparition tells Macbeth he has nothing to fear until "Great Birnam wood" moves to "high ...
Mercutio wants to protect Romeo, and hesitates while Romeo tries to get himself and Tybalt to stop fighting. Tybalt uses it as an opportunity to kill Mercutio. Romeo chases down Tybalt in rage and kills him.