Shards of metal are examples of what type of contamination

Physical contamination occurs when physical objects find their way into foods. These could include dirt, hair, bandages, metal shavings, glass, jewelry, etc. Natural objects, such as fish bones, are also considered physical contaminants.

Explanation:

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answer; i believe its the red blood cells; plz check first good luck

i don't think so because different teachers have different materials. tehy teach differently, unless you know for sure your teacher is the exact same as others. i would just contact ur teacher