What file types are commonly used for images?

The correct answer includes file types that are specifically designed for images. The .jpg (JPEG) format is widely used for photographs and images due to its efficient compression that maintains image quality while reducing file size. The .png (Portable Network Graphics) format is commonly utilized for images requiring transparency and lossless compression, making it ideal for graphics and illustrations on the web. The .gif (Graphics Interchange Format) is primarily used for simple animations and graphics with limited color palettes, while the .bmp (Bitmap) format is an uncompressed raster image format that's straightforward but tends to produce larger file sizes.

The other file types mentioned in the incorrect options do not pertain to images. Document formats like .doc (Word), .xls (Excel), .pdf (Adobe PDF), and .ppt (PowerPoint) are designed for text and presentation content. The second group of formats, which includes .txt (plain text), .xml (eXtensible Markup Language), .json (JavaScript Object Notation), and .html (HyperText Markup Language), are all focused on data representation or web development rather than images. Lastly, the file types like .mp3, .wav, .aac, and .flac are audio formats,