Final answer:
Leftover foods should be refrigerated as soon as possible after eating to prevent bacterial growth and maintain food safety.
Step-by-step explanation:
Leftover foods should be refrigerated as soon as possible after eating to prevent bacterial growth and maintain food safety. When food is left at room temperature, bacteria can multiply rapidly and potentially cause foodborne illnesses. Refrigeration slows down the growth of bacteria and helps to preserve the quality and freshness of the leftover food.