An audio description track for a video tour of a facility exemplifies which web accessibility principle?

The principle of being perceivable is exemplified by an audio description track for a video tour of a facility. This principle, outlined in the Web Content Accessibility Guidelines (WCAG), emphasizes that information and user interface components must be presented to users in ways they can perceive.

Audio descriptions provide critical contextual information not conveyed through visual media alone, thereby enhancing the experience for individuals who are blind or visually impaired. By including audio descriptions, content creators ensure that all users can access the same information, promoting an inclusive environment. This aligns with the broader goal of making content available in multiple formats, catering to varying sensory capabilities.

In contrast, the other principles focus on different aspects of accessibility. Understandable relates to how intelligibly content can be consumed, operable involves ensuring users can interact with interfaces, and robust addresses the compatibility of content with various user agents and assistive technologies. While all these principles are vital for comprehensive web accessibility, the audio description track specifically enhances the perceivability of the video content.