An author's purpose is the reason that he or she is writing a piece; whether it's narrative, persuasive, expository, or informative.
"Gerbils’ teeth grow continuously; therefore, gerbils need to chew daily to keep their teeth short."
Ever since she was a little girl she had been fascinated by dragons. One day she set out to prove their existence real or myth. Many scientist gave her convincing logic for why they couldn't exist. She almost abandoned hope yet her grandmothers words gave her a fresh air of motivation. She started looking elsewhere and found evidence proving they may after all existed.
In the end she never found out which case was true, but believing them kept her childhood dream alive.
What is the prologue say?
