Which of the following CANNOT be sold through a vending machine?

When considering what items can be sold through vending machines, **the main factor to consider** is whether the item can fit within the confines of the machine and be dispensed in a simple manner without needing additional services. Let's analyze the options:

• Snacks: Snacks are ideally suited for vending machines because they are typically packaged, non-perishable (at least for a short shelf life), and sized appropriately for machine storage and dispensing.
• Tickets: Tickets can be sold through vending machines. They are small, easy to dispense, and do not require special storage conditions.
• Tea: Tea, in terms of tea bags or packets, can be easily sold through vending machines. However, brewed tea would require special vending machines that handle hot liquids.
• Shoes: Shoes are generally not suitable for traditional vending machines. **The size, weight, and variety of options like different sizes make it challenging to store and dispense shoes efficiently.** Specialized machines might accomplish this, but they are not common.

In conclusion, considering the typical size and function of a regular vending machine, **shoes cannot be sold** effectively through standard vending machines, while snacks, tickets, and tea can be dispensed without significant issues.