Which of the following is NOT a physical control for safety?

Emergency protocols are procedures and plans established to respond to various incidents or emergencies, such as fire, medical emergencies, or security breaches. While they are crucial for ensuring safety, they are not a physical control. Physical controls are tangible, structural measures or devices that are used to prevent accidents or incidents in a safety context.

On the other hand, barriers, fences, and signs are all physical controls that serve specific safety functions. Barriers are used to block access to hazardous areas, fences can secure a perimeter to deter unauthorized entry, and signs provide visual cues or information to guide behavior and enhance safety awareness. Each of these serves an immediate, physical role in protecting people and property, distinguishing them from emergency protocols, which are procedural responses rather than physical safeguards.