Which of the following is an example of a vector graphic file format?

The correct choice is AI, which stands for Adobe Illustrator Artwork. AI files are specifically designed to hold vector graphic information, meaning they are made up of paths defined by mathematical equations. This allows vector graphics to be infinitely scaled without any loss of quality, making them ideal for illustrations, logos, and other designs that require scalability.

When you save a design as an AI file, it retains its layers, paths, and other elements in a format that can be easily manipulated in Illustrator or other vector-based programs. This capability contrasts with raster formats, which are composed of pixels and become pixelated when scaled beyond their original resolution. Vector formats like AI are crucial for professional graphic design, particularly when high-quality print or scaling is needed.