Which of the following accommodations helps web users with vision impairment?

Ensuring all pages can be rendered by audio screen readers is a crucial accommodation that directly assists web users with vision impairment. Screen readers are software applications that interpret and vocalize the content present on web pages for users who are blind or have low vision. By ensuring compatibility with screen readers, web developers allow these users to access and comprehend the content of a website through text-to-speech technology.

This involves proper HTML markup, such as using semantic tags (like headings, lists, and navigation elements) and providing alternative text for images. These practices ensure that the information is structured in a way that the screen readers can effectively interpret, making it accessible for those who rely on auditory feedback to navigate the web.

Other options, while they may appear to address accessibility in some way, do not provide the same level of support for users with vision impairments. For instance, adding color schemes might enhance visual readability for some users but could potentially make it harder for those with color blindness or low vision to access content. Offering text-based content only restricts the experience and may not leverage accessible technologies effectively. Providing visual icons exclusively fails to encapsulate the needs of visually impaired users, as these icons would be meaningless without alternative text or descriptive context.