Which Web-ready image formats support interlacing?

The correct answer indicates that GIF (both 87a and 89a versions) and PNG formats support interlacing. Interlacing is a method of loading images in a way that allows them to appear gradually on the screen as data is received, rather than waiting for the entire file to download before displaying any part of it.

In the case of GIFs, interlacing is achieved through a technique called interlaced GIF, which allows users to see a lower quality version of the image while the rest is still loading. Similarly, PNGs can be saved with interlacing, employing a technique called Adam7, which enhances the user experience during the loading process by rendering progressively clearer images.

The other options do not encompass web-ready formats known for supporting interlacing. JPEG files, while popular for web images, do not support interlacing. BMP files typically offer raw pixel data without compression or special loading techniques such as interlacing. TIFF and RAW formats are not commonly used for web images, and while they may have interlacing capabilities, they are not designed primarily for web use. Lastly, SVG is a vector format that does not rely on traditional pixel rendering methods, and EPS is a vector format used for print