Which of the following is best categorized as a subgenre of expository writing?

Autobiographies are a form of narrative writing that recounts an individual's life story from their perspective. While they may contain informative elements, their primary purpose is to narrate personal experiences and events rather than to explain or inform in an expository manner. Therefore, they do not fit the definition of expository writing.

Comic strips are a visual storytelling medium that combines illustrations with text to entertain or convey humorous situations. Though they may include informative content, their primary function is to amuse and engage readers through storytelling, which is distinct from the informative purpose of expository writing.

Sonnets are a poetic form that expresses emotions, ideas, or themes in a structured format. Their focus on artistic expression and aesthetics places them outside the realm of expository writing, which centers on clarity and conveying information rather than evoking feelings or imagery.