Is a description of family in an autobiographical narrative example exposition?

No. Exposition is a literary device used to explain or describe something in a piece of writing. It can provide background information, introduce characters, or set the scene. A description of family in an autobiographical narrative would not be an example of exposition, as it is not providing any explanation or description of the family members themselves. Instead, it would be an example of narration, as it is simply recounting the events or experiences of the writer's family.