The example of an item that fits in a particular category is called a prototype

The best example of an item that fits in a particular category is called a prototype

Explanation:

In cognitive psychology, a prototype is the object that best represents a category. When you think of the category "pet" you most likely will think of a dog. Prototypes are mental structures that help us to recall information we already know or organize new information. For example, if you encountered a cat and you had never seen one before, you might think it shares a lot of characteristics with a dog, they both have four legs, fur, a tail and live at home with people, therefore you might infer that it fits within the "pet" category.

i think it's the cabinet