Which of the following describes a functional prototype?

A functional prototype is developed to simulate the actual functionality of a system, enabling stakeholders to interact with the model and evaluate various aspects of the software. It closely resembles the final product in terms of behavior and performance, allowing users to test specific software qualities such as usability, performance, and specific features. This type of prototype serves as a valuable tool in gathering feedback and ensuring that the software meets the requirements before full-scale development begins.

In contrast, other types of prototypes—such as simple models or visual representations—lack the real functionality needed for thorough testing. They may offer a static view or conceptual understanding of the design but do not allow users to engage with the product in a meaningful way that measures its effectiveness or quality. Thus, the working model's ability to provide a hands-on experience with actual functionality makes it the correct description of a functional prototype.