Final answer:
Using the same cutting board for raw chicken and salad items without cleaning is an example of cross-contamination, which can lead to foodborne illnesses.
Step-by-step explanation:
Cutting up raw chicken on a cutting board and then using the same board for chopping salad items, without first cleaning and sanitizing the board, is an example of cross-contamination. Cross-contamination is when microbes are transferred from one food item to another, such as when raw foods that commonly contain bacteria like Salmonella interact with ready-to-eat foods. To prevent foodborne illnesses, it's essential to clean and sanitize all surfaces and utensils after they've been in contact with raw meats before using them for other foods.