In an accessible website, which component is essential for users with screen readers?

In the context of creating an accessible website for users who rely on screen readers, text-based descriptions are vital. Screen readers are assistive technologies that convert text displayed on a webpage into synthesized speech or braille output for users with visual impairments. Therefore, providing text-based descriptions is crucial because it allows these users to understand the content and context of the website, including images, links, and other non-text elements.

When images are included on a webpage, they should be accompanied by alternative text descriptions (often referred to as "alt text") that convey the purpose of the image. This practice helps ensure that users who cannot see the images can still engage with the site's content effectively.

In contrast, high-resolution images, colorful graphics, and Flash animations do not enhance accessibility for users who depend on screen readers and may not provide the necessary information to convey the content or functionality of a website. In fact, Flash animations are generally discouraged in modern web design due to compatibility issues and lack of support in many devices and assistive technologies, further underscoring the importance of text-based content as the primary means of communication for accessibility.