Answer:
an internal conflict; Nate is regretting his decision to move west
Step-by-step explanation:
In the excerpt, we can see that while Rosetta has a positive outlook to life, even if many bad things have happened, Nate has the opposite outlook: a very bleak opinion about what is happening, and about what will happen in the future.
Nate believes that all the hardships he and Rosetta are going through would not have come had not he decided to move west. In other words, he is blaming himself and his decision to move west to pursue a dream, for all the punishing experiences that he is going through.