Which term describes a mental representation used to categorize knowledge?

• A. Prototype
• B. Concept
• C. Memory
• D. Schema

Answer: (B)

The main idea here is how we mentally organize knowledge into units called concepts. A concept is a mental representation that groups together objects, events, or ideas that share common features, making it easier to categorize and reason about them. In this sense, the term described is concept, because it refers to the basic unit we use to sort information into categories.

A prototype, by contrast, is the most typical example within a category, used to judge whether something belongs there, not the general representation of the category itself. A schema is a broader framework or set of expectations about a domain, guiding how we interpret new information by drawing on multiple concepts. Memory is about storing and recalling information, not specifically about categorizing knowledge. So the best fit is concept, the mental representation that underpins how we group knowledge into categories.