Which file extension is less likely to support transparency, .gif or .jpg?

The .jpg file extension is less likely to support transparency because the JPEG format is primarily designed for photographic images and does not include an alpha channel, which is necessary for transparency. Consequently, any transparent background will appear as a solid color instead. This limitation makes .jpg files suitable for images with complex gradients and a wide range of colors but inadequate for graphics that require transparency, such as logos or icons with clear backgrounds.

In contrast, the .gif format supports transparency with a binary choice (either a pixel is fully transparent or fully opaque), making it suitable for simple graphics with solid colors. The .png format is more advanced, allowing for varying transparency levels, while the .svg format consists of vector graphics, which inherently support transparency and scalability without losing quality. These characteristics position .jpg as the file type that typically does not accommodate transparent features.