Captioning falls under which WCAG principle?

Captioning falls under the principle of Perceivable in the Web Content Accessibility Guidelines (WCAG). This principle emphasizes that information and user interface components must be presented to users in ways they can perceive. Captions make audio content accessible to individuals who are deaf or hard of hearing by providing text representation of spoken dialogue, sound effects, and other relevant audio information. This allows users to access the same content that is available to hearing users, ensuring an equitable experience.

Perceivable also encompasses other aspects such as providing alternatives for non-text content and ensuring that content is displayed in a way that does not hinder understanding, which all aligns with the purpose of captioning. The other principles, such as Operable, Robust, and Understandable, focus on different aspects of accessibility that relate to user interaction, compatibility with various technologies, and clarity of information, but they do not specifically address the need for making audio content accessible through visual means like captioning.