Which term describes a story written to be performed on stage?

The term that describes a story written to be performed on stage is "drama." Drama specifically refers to works that are intended for theatrical performance, encompassing both the script and the action on stage. This genre includes elements such as dialogue, character interactions, and stage directions, which are all essential for conveying the story in a live setting.

While the term "narrative" refers to any form of storytelling, it does not specifically denote the format intended for performance. Similarly, "prose" denotes written or spoken language in its ordinary form, without metrical structure, which can apply to various forms of writing beyond theatrical works. The term "script" indeed refers to the written text of a play or performance, but it does not convey the broader artistic intent and structure inherent in drama itself. Drama is a more comprehensive term that encapsulates the genre's performative aspects, making it the correct choice.