What classification includes items available at a vending machine?

The classification that includes items available at a vending machine is characterized by the unique nature of selection and accessibility of products in an automated format. Vending machines specifically offer a variety of snacks and beverages, and their operation allows customers to easily obtain these items without direct interaction with staff. This category emphasizes convenience and immediate access to various food and drink options, which aligns perfectly with the definition of a vending machine.

In contrast, the other classifications refer to different contexts. Standard menu items typically relate to a restaurant or food service establishment's defined offerings that are prepared and served directly by staff. Nutrient-content claims are statements that describe the level of a nutrient in a food product, regulated by food labeling laws. Self-service items could encompass a broader variety of items found in buffets or salad bars where customers serve themselves, but do not specifically identify the automated nature of vending machines.