Which type of cross contamination involves germs spread by coughing or sneezing?

The correct answer is biological contamination. This type of contamination occurs when germs or microorganisms, such as bacteria and viruses, are transferred from one person to another through biological processes. When someone coughs or sneezes, respiratory droplets can carry these germs and potentially contaminate surfaces or be inhaled by others, leading to the spread of illness. This method of transmission is particularly relevant in environments such as restaurants or healthcare settings, where the risk of spreading infectious diseases is a significant concern.

While the other types of contamination may involve different hazards, they do not apply to the transmission of germs by coughing or sneezing. Chemical contamination involves harmful substances, such as pesticides or cleaning agents. Physical contamination includes foreign objects, like hair or dirt, that might inadvertently mix with food products. Environmental contamination typically refers to exposure to pollutants in the air, water, or soil, rather than the biological transfer of pathogens through direct human interaction. Understanding these distinctions is vital for maintaining hygiene and safety in various settings.