Which type of hazard is a physical hazard?

A physical hazard refers to tangible risks that can be observed and measured. These include things that can cause harm or damage due to their physical presence, such as slippery floors, machinery, or dangerous weather conditions. Therefore, the option describing hazards that can be seen accurately captures the essence of what a physical hazard is; they are not conceptual or abstract but rather concrete elements that create risk in a particular environment.

In contrast, invisible risks may include psychological or intangible factors, which do not fit the definition of a physical hazard. Theoretical threats are also not physical but rather hypothetical scenarios that might not have a basis in actual observable conditions. Lastly, stating that natural disasters are the only type of physical hazard limits the broader range of hazards since they can include many other visible risks that are not necessarily tied to natural events.