Which of the following enhances accessibility for visually impaired users?

Using alt text for images significantly enhances accessibility for visually impaired users because it provides a textual description of images that can be read by screen readers. Screen readers are assistive technologies that convert text into speech or Braille, allowing users who cannot see the images to understand their content and context.

When an image is present on a webpage, blind or visually impaired users rely on the alt text to gain the necessary information that the image conveys. Without alt text, these users might miss essential information that could be critical to navigating the content effectively. Therefore, including descriptive alt text ensures that visual content is accessible and that users with visual impairments can engage fully with the online material.

The other options do not provide the same level of accessibility. Restricting text to short phrases may limit the richness of content available to all users, not just those with visual impairments. Minimizing white space can actually hinder readability for users with different cognitive or visual access needs. Using only visual cues for navigation excludes those who rely on auditory or tactile feedback, thus failing to address the diverse ways individuals interact with web content.