Food can be contaminated in three main ways: biological, chemical, and physical, usually through unsafe handling, dirty equipment, or poor storage at any point from farm to table. Since you did not list the answer choices, the option that is “not a way that food can be contaminated” is the one that does not involve adding germs, chemicals, or foreign objects to the food, or does not involve unsafe temperatures or cross‑contamination.

Common ways food is contaminated

  • Biological contamination
    Harmful bacteria, viruses, or parasites get into food from dirty hands, sick food handlers, raw meat juices, contaminated water, or animal waste. Examples include Salmonella in undercooked poultry or E. coli from fecal contamination.
  • Chemical contamination
    Chemicals such as cleaning products, pesticides, or residues from non‑food‑safe containers get into food. Unwashed fruits and vegetables with pesticide residues are also a common source.
  • Physical contamination
    Foreign objects like glass, metal fragments, hair, plastic, stones, or pieces of packaging end up in the food. These usually come from damaged equipment, broken containers, or poor handling practices.

Typical wrong (correct) option in quizzes

In multiple‑choice questions, the statement that is not a way food can be contaminated is usually something like:

  • “Storing food at safe temperatures”
  • “Washing hands thoroughly before handling food”
  • “Using clean, sanitized utensils and equipment”
  • “Cooking food to the correct internal temperature”

All of these are prevention methods, not contamination routes, so such an option would be the correct answer to “which one of the following is not a way that food can be contaminated.”

If you share the exact options, a precise answer can be given in one line.