Organizers move a festival from a cliffside overlook to a flat city park specifically to cut fall exposure for attendees. What treatment idea does this demonstrate?

Altering the context of an activity — such as relocating from a cliffside to a park — can avoid or substantially reduce specific exposures while preserving the event's objectives. That contextual change is a legitimate treatment alongside controls and transfer, and it illustrates that treatment is not limited to insurance purchases alone.