Which of the following is considered a potentially hazardous food?

Hamburger is considered a potentially hazardous food because it contains proteins and moisture, making it an ideal environment for the growth of harmful microorganisms. Potentially hazardous foods have a higher risk of fostering bacterial growth when not stored or prepared properly. Ingredients such as meat, poultry, seafood, and dairy products are typically categorized as potentially hazardous due to their nutrient-rich composition, which can allow pathogens to thrive.

In contrast, options like apples, bread, and rice cakes typically have a lower moisture content or natural preservatives that deter bacterial growth, making them less susceptible to causing foodborne illnesses. Apples, being whole fruits, have a natural barrier that protects them from contamination, bread is usually shelf-stable under proper conditions, and rice cakes are dry and have low moisture, which limits the growth of dangerous bacteria. Thus, hamburger stands out among the options as a food that requires careful handling and storage to ensure safety.