What is an example of the 'Perceivable' principle in web design?

The 'Perceivable' principle in web design emphasizes that users must be able to perceive the information being presented on a website. This principle is one of the foundational concepts in the Web Content Accessibility Guidelines (WCAG), which aim to make web content more accessible to individuals with disabilities.

Text alternatives for visuals play a crucial role in this principle because they provide a means for users who cannot see images—such as those who are blind or have low vision—to access the information conveyed by those visuals. For example, using alt text for images allows screen readers to describe the content of the image to the user, ensuring that visual information is accessible regardless of the user's ability to perceive it visually.

While uniform background colors, consistent button shapes, and high-resolution images contribute to overall usability and aesthetic quality, they do not specifically address the requirement to make information perceivable to users with differing abilities. Therefore, the correct answer exemplifies how accessibility can be built into web design by ensuring that all users, regardless of their sensory abilities, can access and understand the content on a website.