Answer:
Chronological order.
Step-by-step explanation:
A biography is a nonfiction book with the topic of a person's life. It would make the most sense for it to be in chronological order.
For Example:
If we were writing a story about a Abraham Lincoln, we would cover his childhood before his time as president of the United States. It wouldn't make sense if we explained everything in alphabetical order or numeric order.
Chronological order should be the correct answer.