The correct answer that would best complete the given statement above would be a myth. Myth is a traditional story about legendary heroes and supernatural beasts. Generally, myths do not have a basis on facts or natural explanation and is often based on one's culture.
Krakauer won't get to those details until near the end of the book. Secondly, by starting at the end of the story, Krakauer is indicating that this book will be centrally concerned with exploring Chris's death. The facts of his life will be important insofar as they provide an explanation for how it ended.
Now use these, and this website: https://webapps.towson.edu/ows/activepass.htm
to help you with the rest.
The way I like to remember it, is to take the first noun and the second noun and switch them, then alter the verb tense and sentence structure to make it make sense.
