What do guards protect against when placed near roof hatch openings that service appliances?

The correct answer focuses on the primary function of guards near roof hatch openings, which is to prevent falling objects. These guards are essential safety features designed to shield individuals working in or around the area from potential hazards that might occur during operations. When accessing appliances through a roof hatch, workers may inadvertently drop tools, materials, or equipment. The guards act as a barrier that helps minimize the risk of injury to individuals below by catching or redirecting any falling items.

While it might be true that guards can contribute to additional safety aspects, like reducing slips and trips or mitigating access issues, their main role in this context is to protect people from falling objects that can cause serious injuries. Recognizing this function is crucial for understanding how safety measures are implemented in work environments, particularly when involving elevated or rooftop access points.