Final answer:
Proper cleaning and sanitization practices prevent cross-contact by minimizing the chances of allergens or other contaminants spreading to different foods or surfaces.
Step-by-step explanation:
The step that prevents cross-contact is ensuring proper cleaning and sanitization practices. This involves washing hands before handling food, using separate utensils and cutting boards for different types of food, and regular cleaning of kitchen surfaces and equipment. For example, if someone is allergic to peanuts, using the same cutting board for chopping peanuts and other vegetables could result in cross-contact.
Learn more about Preventing cross-contact in food handling