I'm going to say "It set up the events necessary for the surprising conclusion." :)
Answer:
Injury--means to harm or damage a person physically or mentally.
Explanation:
Injury is a physical or mental harm inflicted by a source. A person can be injured by another person or being as well as a person can self injury.
Persuasive because you're trying to convince the reader to think or do something that's in your opinion that u want them to think or do.