Which of the following is an example of physical contamination?

Physical contamination occurs when foreign objects or materials unintentionally mix with food, posing potential hazards to consumers. In this context, metal shards from broken equipment exemplify physical contamination because these foreign objects can cause injury, choking, or damage if ingested. Ensuring the safety of food involves regular maintenance and inspection of equipment to minimize the risk of such contamination.

In contrast, salmonella from raw chicken represents a biological hazard, as it involves harmful microorganisms that can cause foodborne illness. Bacteria from dirty utensils also denotes a biological concern, highlighting the importance of proper sanitation and cleanliness in food preparation. Pesticides on fruits and vegetables are associated with chemical contamination, where harmful substances can remain on foods, posing health risks if consumed. Each of the other options highlights different contamination types, emphasizing the need for thorough food safety practices.