Which of the following can lead to foodborne illness if not practiced correctly?

Purchasing food from unsafe sources can indeed lead to foodborne illness if not practiced correctly. When food products are acquired from suppliers that do not adhere to safety regulations or standards, there is a significant risk of contamination. This can occur if the food has been improperly handled, stored, or transported, potentially leading to the introduction of harmful pathogens or chemicals. Ensuring that food is sourced from reputable suppliers who follow necessary safety protocols is essential to prevent foodborne illnesses.

In contrast, proper cooking techniques, holding food at correct temperatures, and using clean utensils are practices that, when executed correctly, help mitigate the risk of foodborne illnesses. Cooking techniques and temperature control are vital for killing pathogens, while clean utensils prevent cross-contamination. Therefore, while all the options relate to food safety, purchasing food from unsafe sources directly compromises the safety of the food before it even reaches the establishment.