In the context of creating accessible Power BI reports, what does adding alt text to visuals accomplish?

Adding alt text to visuals in Power BI is essential for improving accessibility, as it provides a description of the visual that can be interpreted by screen readers. This functionality is particularly important for users who have visual impairments, as screen readers convert text to speech, allowing these users to understand the content and context of visuals. By including alt text, report creators ensure that all users can grasp the information presented, fulfilling accessibility standards and promoting inclusivity.

The other options do not accurately describe the purpose of alt text in this context. For instance, displaying text on the screen when visuals are not loaded does not relate to alt text, and neither does allowing keyboard interactions with visuals. Changes in color are not relevant to the function of alt text, as its primary focus is on providing meaningful descriptions rather than altering the appearance of the visuals themselves.