Why do contaminated food contaminate in certain subatances?

Contaminated food can harbor certain substances due to various factors, including the environment in which the food is produced, processed, and stored. Pathogens, chemicals, or toxins can be introduced through soil, water, equipment, or handling practices. Additionally, cross-contamination can occur when raw and cooked foods come into contact or when food is improperly stored. These factors contribute to the presence of specific contaminants in food products.