What are the four principles of accessibility outlined in WCAG?

The four principles of accessibility outlined in the Web Content Accessibility Guidelines (WCAG) are Perceivable, Operable, Understandable, and Robust.

The principle of Perceivable ensures that users can perceive the content presented to them, meaning all information must be available to the senses, whether that be through sight, sound, or touch. This could involve providing text alternatives for non-text content or ensuring that text is readable and resizable.

Operable involves ensuring that users can interact with the content. This means that all user interface components must be operable through various means, including keyboard navigation, and must not interfere with the ability of users to navigate through the content.

Understandable refers to making the content and interface clear and predictable. Users should be able to easily comprehend the information being presented and be able to navigate the site without confusion.

Robust encompasses the need for content to be compatible with a variety of user agents, including assistive technologies. This principle encourages developers to create content that can function across different platforms and technologies, ensuring that it remains accessible as technologies evolve.

The other options do not accurately represent the principles outlined in WCAG and therefore do not contribute to the foundational framework of web accessibility that is necessary for creating inclusive digital spaces.