Which term describes the audience needing to move around the performance space to see the action?

The term that describes the audience needing to move around the performance space to see the action is promenade. This style of performance involves the audience walking or moving throughout various locations within the performance area, allowing them to actively engage with the production from different viewpoints. This immersive approach brings a dynamic and participatory experience, as the audience gets to explore the environment and witness different aspects of the story as they unfold.

The other options, while related to theatrical techniques, do not pertain to the audience's movement within the performance space. For example, a fast fade to often refers to a quick transition in lighting designed to change the scene or moment on stage, while a blackout is a complete loss of light, typically used to signal a scene change or the end of a performance. Snap to may refer to a quick, sharp movement or sound but is not associated with how audience members interact with a performance space. Thus, promenade is the accurate term for the described scenario.