What term describes a 'picture element' in digital images?

• A. A color space model
• B. A picture element
• C. A type of audio sample
• D. A method of compressing data

Answer: (B)

A digital image is made up of tiny building blocks that determine what you see at each point, and that unit is called a picture element, commonly known as a pixel. Saying the term is a picture element directly identifies this smallest unit that carries color information in the image, which is exactly what the question asks for. In practice, pixel is the widely used shortcut for picture element, so they describe the same idea. The other options point to different concepts: a color space model deals with how colors are represented, an audio sample relates to sound data, and a data compression method is about reducing file size.