The safety of family and friends
Persuasive Devices - Think debates. People will use the art of persuasion to make their ideas appealing to the audience. It applies the same way here. The author will use persuasive devices to make their ideas known to the reader and make them appealing.
Answer:
they increase the readers understanding of events
Explanation:
the long and complex sentence mostly describe more details on the topic thus enhancing the readers' undestanding