The nonfiction genre that is defined as a story of real peoples' lives told by other people is biography.
The nonfiction genre that is defined as a story of real peoples' lives told by other people is called biography. To find the answer to this question, you can utilize various resources such as books, online articles, or educational websites. Conducting a search on the topic of nonfiction genres or specifically searching for the definition of biography will provide you with the correct answer.