Question

What makes South!, a memoir by Ernest Shackleton, fall under the nonfiction genre?

Answer 1

The narrator was part of the adventure that he writes about.
The story is based on the narrator’s real-life experiences.
The narrator uses his imagination to weave an emotional story.
The story contains more than one important character.

I wanna know witch one is the right answer?

Answer 2

It is a memoir. Memoirs describe actual events and are therefor nonfiction.