Which term describes the main character's journey in a story?

The term that accurately describes the main character's journey in a story is "protagonist." The protagonist is typically the central figure around whom the story revolves, and their experiences, conflicts, and growth drive the narrative forward. This character often faces challenges that lead to development and change, making their journey essential to the overall arc of the story.

While plot refers to the sequence of events in the story and theme denotes the overarching message or central idea conveyed through the narrative, neither of these terms specifically encapsulates the protagonist's journey. The antagonist, on the other hand, represents opposition to the protagonist but does not embody the journey itself. Therefore, the protagonist is the most fitting choice that highlights the journey of the main character in a story.