What element does Postmodernism include according to the provided details?

Postmodernism is characterized by its departure from traditional artistic styles and conventions, embracing instead a mixture of diverse approaches, including elements of confrontation and humor. This aspect is significant because it reflects a tendency to challenge established norms, question previous narrative forms, and often incorporate irony or playfulness into the artwork.

In Postmodern art, artists frequently use humor to subvert expectations and create a dialogue with the audience. This can manifest through parody, satire, or the mixing of high and low cultural references, making the work accessible and relatable. Such elements not only engage the viewer but also provoke thought and invite multiple interpretations, which is a hallmark of Postmodern thought.

The other choices represent characteristics that are generally more aligned with modernism or traditional art movements. For instance, conventional artistic styles, clear artistic authority, and traditional art techniques emphasize structure, formality, and a hierarchy within the art world that Postmodernism often seeks to dismantle. Thus, the incorporation of confrontation and humor is essential for understanding how Postmodernism distinguishes itself within the broader context of art history.