Which file extension is commonly associated with graphics files?

The file extension commonly associated with graphics files is .jpg. This extension represents the JPEG (Joint Photographic Experts Group) format, which is widely used for digital images, particularly those that contain complex colors and gradients. JPG files are popular for photographs and are commonly utilized on websites and social media due to their efficient compression, which results in manageable file sizes while maintaining decent image quality.

In contrast, the other options serve different purposes: .txt is a plain text file used for unformatted text, .exe is an executable file type used to run programs on a computer, and .html is a Hypertext Markup Language file used for creating and structuring content on the web. Each of these file types has its specific applications, but .jpg is distinctly recognized for its association with graphic files, particularly images.