Which of the following is an example of “perishable” mail?

The example of “perishable” mail refers explicitly to items that are susceptible to spoilage or degradation over time, which directly applies to food items that spoil. These items have a limited shelf life and can deteriorate quickly if not handled or delivered in a timely manner. This classification highlights the importance of swift and efficient postal service operations for perishable mail, as delays can significantly impact the quality and safety of the items being sent.

In contrast, printed materials, books, and magazines do not face the same urgency when it comes to delivery, as they do not spoil or degrade in the same manner as food items. Non-perishable goods, as the term suggests, remain stable and unchanging over time, further distinguishing them from perishable items. Therefore, identifying food items as perishable mail is crucial for understanding how the postal service prioritizes different types of shipments based on their nature and time sensitivity.