Answer:
1) Their tone is objective.
This is an accurate statement about the authors of nonfiction. Nonfiction authors aim to present factual information and ideas about real people, places, and events. They often strive to be objective, meaning they present information in a neutral and unbiased way, free from personal opinions or feelings. However, this does not mean that all nonfiction is completely objective or free from bias. Some nonfiction authors may have a specific agenda or point of view that they want to express, and their writing may reflect this.