What do physical hazards result from?

Physical hazards arise from the transfer of physical energy that can cause harm or injury in the workplace. These types of hazards are associated with various forms of physical energy, such as mechanical, thermal, electrical, and radiation energy. For instance, equipment that moves or can generate heat poses a risk of accidents or injuries such as burns and fractures.

In contrast, the other options represent different categories of hazards. Exposure to infectious agents is linked to biological hazards, which deal with exposure to organisms that can cause disease. Chemical reactions in the workplace pertain to chemical hazards, involving substances that can cause harm through reactions, inhalation, or skin contact. Psychosocial factors encompass issues like workplace stress and mental health, which, while important, do not fall under the physical hazard category. Thus, the correct option accurately identifies the nature of physical hazards and their causes.