Which of the following represents a format exclusively for storing visual assets from Adobe Animate?

The correct choice is .fla because it is the native file format used by Adobe Animate to store all project-related information, including animations, graphics, sound, and timelines. This format allows for the manipulation and editing of all elements within a project, making it essential for anyone working within Adobe Animate to manage and maintain visual assets.

In contrast, other formats do not exclusively store visual assets from Adobe Animate. For example, .swf is a format for exporting animations and can be used for playback in a web browser or other applications, but it is not a working file for creating or editing in Animate. .xml is a data format used for structured data storage, and while it can be used in various applications, it is not specific to Adobe Animate's visual asset management. Similarly, .txt is a plain text file that does not hold any visual data or project-specific information related to animations or graphics.