Final Answer:
PNG, JPEG, and GIF are examples of file extensions used for "picture" files (Option C).
Step-by-step explanation:
File Extensions: File extensions are suffixes added to the end of a filename, indicating the format or type of the file.
PNG (Portable Network Graphics): This file format is commonly used for storing images with transparent backgrounds. It is suitable for various types of images, including graphics and photographs.
JPEG (Joint Photographic Experts Group): JPEG is a widely used file format for compressing and storing photographic images. It is suitable for images with gradients and a wide range of colors.
GIF (Graphics Interchange Format): GIF is a file format commonly used for simple animations and images with a limited color palette.
Option C is the answer.