Which term describes a story that is a product of imagination rather than documentation of fact?

The term that describes a story that is a product of imagination rather than a documentation of fact is "fiction." Fiction refers to creative works, such as novels and short stories, that are invented by the author, involving characters, settings, and events that are not necessarily based on real-life occurrences. This genre allows for a wide scope of creativity and exploration of themes, as it can include anything from fantastical worlds to realistic characters and situations that are entirely made up in the author’s mind.

In contrast, the other options represent different types of writing that focus on factual content or personal experiences. For example, the term "fact" refers to information that can be verified and is grounded in reality. "Non-fiction" encompasses works that are based on real events, people, or information, such as biographies, essays, and historical accounts. A "memoir" is a subset of non-fiction that recounts the author's personal experiences and reflections on their life, often focusing on specific themes or periods. These forms of writing do not embody the imaginative freedom found in fiction.