<em><u>Writers who use the narrative style are telling a story with a plot and characters. It's the most common writing style for fiction, although nonfiction can also be narrative writing as long as its focus is on characters, what they do, and what happens to them.</u></em><em><u>Narrative is the only one of the answers that needs those elements.</u></em>
You can take "in fact" out of the sentence to help with determine what type of sentence it is because it's a prepositional phrase. This leaves us with "Only a small percentage of Southern Africa is desert" which is a simple sentence.
