What change in the chorus was most significant in the development of western theater?

The most significant change in the chorus in the development of Western theater was its transition from a central narrative function to a more supportive role. Originally, the chorus played a vital part in conveying the story, commenting on the action, and engaging with the audience. Over time, particularly in the works of playwrights like Euripides, the chorus became less integral to the plot and more focused on enhancing themes and emotions, paving the way for more complex character-driven narratives and the emergence of individual protagonists. This shift marked a key evolution in theatrical storytelling and character development.