Which of the following models allows for interaction through computer-aided design?

The virtual model is the correct response because it refers to a computer-generated representation that allows users to manipulate and interact with the design elements in a simulated environment. This model enables designers to visualize their ideas and make changes in real-time, facilitating a more dynamic design process.

Virtual models are often created using computer-aided design (CAD) software that provides tools for modifying shapes, sizes, textures, and other attributes. This capability enhances collaboration among team members, as they can share and edit the same virtual model easily, regardless of their physical location, thus streamlining the design workflow.

In contrast, physical models are tangible representations of a design made using materials like clay or wood, which don’t allow for interactive manipulation through software. Graphical models typically indicate the visual aspects of a design, such as sketches or diagrams, but may not possess the interactivity of virtual models. Conceptual models usually represent abstract ideas and relationships rather than detailed, interactive designs. Therefore, the interactive nature of a virtual model, enabled by computer-aided design, distinguishes it as the best option in this context.