"Perceivable" refers to the ability to be seen, heard, or otherwise sensed by individuals. In the context of design and accessibility, it means that information and user interface elements must be presented in a way that users can easily notice and understand. This includes using clear visuals, readable text, and audible cues to ensure that all users, including those with disabilities, can access the content. For example, in web design, ensuring that images have descriptive alt text allows users with visual impairments to perceive the content through screen readers. Similarly, providing captions for videos helps those who are deaf or hard of hearing to perceive the audio information.