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. Biographies are written accounts of a person's life story, usually written by someone else. They provide an in-depth examination of a person's life, accomplishments, and experiences. To find the answer to this question, you could refer to your knowledge of literary genres, or you could conduct a quick search using search engines or library databases.
