Answer:
It is so harsh that it may cause the protagonist's death.
Explanation:
The setting of Julie of the Wolves was somewhere in Northern Alaska sometimes in the 1970s and it was set on open ground in cold, harsh weather and this setting is important because It is so harsh that it may cause the protagonist's death.
for future "askers", I'm pretty positive that the answer is a.)emotions and ethics. It is in the lessons (I just read it)
Hope this helps.
Complex because a complex sentence has 1+ fragments of a sentence, and 1+ complete ideas