A model that exists in the mind used to help us know and understand ideas.

• A. Conceptual modelling
• B. Digital human
• C. Fidelity
• D. Bottom-up modelling

Answer: (A)

A mental representation used to understand ideas is best captured by conceptual modelling. It refers to a simplified framework that exists in our minds to organize thoughts, show how ideas relate, and reason about how a system works at a high level without getting bogged down in details. In design and technology practice, creating a conceptual model helps you grasp the essential components and their relationships, so you can communicate and test ideas more effectively.

The other terms point to different concepts: a digital human is a digital representation of a person used for analysis or simulation; fidelity describes how accurately a model matches the real world; bottom-up modelling is about building a model starting from detailed parts up to the whole.