Answer:
C. Imagery
Explanation:
Imagery is a literary device that uses descriptive words to help you visualize what is happening in the story. Some words that were used here to depict this are "purple", "blueberry", and "rivers"
I would choose topic number 10 - Africa and its problems.
This is a complex sentence because it has a semicolon, semicolons or things like them show a sentence may be complex