The use of computers to aid the design process.

• A. Computer Aided Design (CAD)
• B. Conceptual modelling
• C. Bottom-up modelling
• D. Fidelity

Answer: (C)

Using computers to aid the design process is Computer-Aided Design (CAD). CAD lets designers create precise digital models, edit geometry easily, run analyses, generate drawings, and share data. It supports rapid iteration and accuracy, and the work remains digital rather than relying on hand drafting or physical prototypes alone. Conceptual modelling, by contrast, is about exploring and communicating ideas through simplified representations, not necessarily using computer tools for final design. Bottom-up modelling describes starting with individual components and assembling them into a complete product, a design approach rather than a generic description of computer use. Fidelity refers to how closely a model represents the real thing, focusing on realism or accuracy rather than the method of design work.