Which of the following is considered a physical hazard in food?

Glass fragments are classified as a physical hazard in food because they are solid, tangible objects that can inadvertently contaminate food products, posing a risk of injury if consumed. Physical hazards are typically inert objects that can cause harm through physical means, such as cuts or choking, when they are present in food.

In contrast, harmful chemicals and pesticides represent chemical hazards; these can lead to adverse health effects due to the chemical reactions in the body but do not have a physical presence that can cause direct physical harm like glass can. Bacteria are categorized as biological hazards since they are living organisms that can cause foodborne illnesses but do not fit into the physical category. Thus, glass fragments are the clear choice as a physical hazard in food safety.