Final answer:
The three structural elements of a myth are binary oppositions, mythemes, and the primary messages. These elements help define a myth's structure and convey its cultural or universal truths.
Step-by-step explanation:
The three structural elements of a myth according to the theory of structuralism are binary oppositions, mythemes, and the primary messages of the myth. Binary oppositions refer to two contrasting concepts that are fundamental to the structure of the myth. Mythemes are minimal units of a story, the stripped-down components that form the myth's structure. Finally, the primary messages represent the universal or cultural truths that the myth conveys to its audience. Myths play a significant role in society by shaping worldviews, explaining origins, and teaching social norms.