Physical hazards in food are foreign objects that can accidentally enter food during processing or handling. These include materials such as hair, glass, metal, or stones, and can cause injury if consumed.
Hair is a typical example of a physical hazard in food safety, as it can contaminate food due to improper hygiene practices.
Why other options are incorrect:
(A) Visible biological hazard : Bacteria — Bacteria are biological hazards, but they are not visible to the naked eye.
(B) Invisible microbiological hazard : Worms — Worms are generally visible, and not categorized as “invisible microbiological hazards.”
(C) Chemical hazard : Bone fragments — Bone fragments are physical, not chemical, hazards.