Which of these file types can be compressed?

The file type that can be compressed is the .gif. This is because .gif (Graphics Interchange Format) is designed for web use and supports compression through a technique known as lossless compression. This allows for smaller file sizes while maintaining the quality of the image, making it ideal for simple graphics and animations on the internet.

In contrast, .tiff, .raw, and .bmp are typically larger file formats that are often used to store high-quality images without compression, preserving all the detailed information. While .tiff can be compressed, it is not inherently a compressed format, and .raw images are usually uncompressed to retain the highest quality for editing purposes. .bmp files, known for their bitmap images, also do not use compression by default, as they prioritize image quality over file size. Thus, .gif is the best candidate for a file type that can effectively utilize compression.