Select the object or property that screen readers interpret.

The choice of alt text is significant because it serves as a textual description for images, which screen readers use to convey information to users who are visually impaired. When a screen reader encounters an image, it looks for the alt attribute associated with that image tag in the HTML code. If alt text is provided, it reads that text aloud to the user, enabling them to understand what the image represents.

On the other hand, sound and movies do not have built-in descriptive text that screen readers can interpret directly. Although accessibility features can sometimes complement these elements, they do not inherently provide descriptions the same way alt text does. Image maps are more complex as they involve interactive elements tied to specific areas on an image, and without appropriate alt text for the entire image or each interactive area, a screen reader may not convey this information effectively. Alt text is specifically designed to enhance the accessibility of images, making it the correct choice.