Final answer:
The portal of entry for a food-borne illness is contaminated food.
Step-by-step explanation:
The portal of entry for a food-borne illness is contaminated food. When food is contaminated with pathogens such as bacteria, viruses, or parasites, consuming it can lead to an infection or illness.
For example, if raw poultry is not cooked at the correct temperature, the Salmonella bacteria present in the meat can survive and cause illness if consumed.
It is important to practice proper food hygiene and safe handling techniques to prevent contamination and reduce the risk of food-borne illnesses.
Learn more about Food-borne illness