The common elements in a non-fiction narrative are the presentation of true and non-imaginary facts, the symbolism, the narration with a third-person point of view, and the very human characters.
The most important element in a nonfiction narrative is the presence of realism, as the text presents real facts and characters that do not depend on the author's imagination but express his thoughts and conclusions about the story.
You didn't show the passage to which this question refers, which makes it impossible for me to answer it exactly. However, I hope the above information can help you.
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