What is the staging called when the audience surrounds the acting area completely?

The correct term for when the audience surrounds the acting area completely is "In the round." This staging creates an immersive experience, allowing the audience to view the performance from multiple angles. It enhances the connection between the performers and the spectators, as actors can engage with the audience on all sides, fostering a more intimate atmosphere.

In contrast, thrust staging has the audience seated on three sides, which offers a close view but does not fully surround the acting area. End-On or Proscenium Arch staging has a more traditional setup where the audience faces the stage directly, similar to a movie theater, which limits interaction and perspective. Promenade staging involves the audience moving through the performance space, often following the action as it unfolds, but does not imply being completely surrounded by it. Thus, "In the round" accurately describes the unique characteristic where the audience surrounds the actors entirely.