Which item is an example of a physical hazard?

The correct choice is a hair in food, which is considered a physical hazard. Physical hazards refer to foreign objects that can accidentally contaminate food and pose a risk to consumers. These objects can cause injury or discomfort when consumed. A hair falling into food is a clear example of a physical hazard because it is an actual solid object that can be easily detectable and removed. Preventing physical hazards is crucial in food safety management to ensure that the food served is not only safe to eat but also free from any materials that could cause harm.

In contrast, the other choices represent different types of hazards. Bacteria from raw meat is a biological hazard, as it involves microorganisms that can lead to foodborne illnesses. Excess sugar, while it can have health implications, is a common ingredient and does not constitute a physical hazard. Allergic reactions to meals relate to individual sensitivities and are a consequence of specific food components, thus falling under chemical or allergenic hazards rather than physical hazards.