Which term describes a work of literature that employs humor and irony to criticize societal norms?

The term that best describes a work of literature that uses humor and irony to criticize societal norms is "satire." Satire combines wit and exaggerated scenarios to highlight flaws in society, politics, or human behavior, often aiming to provoke thought and inspire change. By employing humor and irony, satire allows writers to engage their audience while simultaneously delivering a critical commentary on the issues at hand. This makes satire not only entertaining but also a powerful tool for social critique.

The other choices do not encompass the same breadth of meaning. Sarcasm refers specifically to a sharp, often satirical remark, but it lacks the broader context of societal critique found in satire. A soliloquy is a device used in drama where a character speaks their thoughts aloud, often revealing inner conflict or emotions, and does not inherently involve humor or societal commentary. Repetition is a rhetorical device where words or phrases are repeated for emphasis, which doesn't relate to the critique of norms or the use of humor as seen in satire. Thus, "satire" is the most fitting choice for the definition provided.