Final answer:
Environmental contamination is not a separate category of contamination; it broadly encompasses all types of environmental contaminations such as chemical substances and biological agents.
Step-by-step explanation:
The examples of contamination given in the question include: Pathogenic contamination, Chemical contamination, and Physical contamination, which are typical forms of contamination encountered in food safety and environmental health. However, Environmental contamination is not typically classified as a separate category alongside pathogenic, chemical, and physical contaminations because it serves as a broader term encompassing all types of contaminants that can be present in the environment such as air, water, or soil. These may include both chemical substances and biological agents like mold or algae blooms. Additionally, in food safety, environmental contaminants can refer to substances that food comes into contact with at any point in its journey from production to consumption.
Thus, the correct answer to the question 'All of the following are examples of contamination except which one?' would be D) Environmental contamination, because it is a general term that actually includes other forms of contamination, rather than being a distinct category itself.