Guarding in robot safety refers to what?

• A. Software-only restriction
• B. A compliance certificate
• C. Visual barrier indicators only
• D. Physical barriers that prevent access to the robot's hazardous area

Answer: (D)

Guarding is about creating physical barriers that prevent people from entering the robot’s hazardous area. The idea is to physically stop or deter access so the robot can’t come into contact with someone while it’s moving or operating. That’s why enclosures, fences, gates with interlocks, safety cages, and other barriers are used in practice. Visual cues or software checks don’t stop a person from reaching the danger zone, and a compliance certificate doesn’t provide actual protection either. So the best choice is the one describing physical barriers that prevent access to the robot’s hazardous area.