Which option defines 'medium' as a way of expressing art or communication?

• A. Something in a middle position
• B. Surrounding objects; environment
• C. A chemical substance used as a solvent
• D. A way of expressing something, such as photography or print

Answer: (D)

Medium in art and communication refers to the method or vehicle used to express an idea. It’s about how something is conveyed—the channel or form of expression—rather than where it sits or what surrounds it. Saying it is a way of expressing something, such as photography or print, captures this sense perfectly. The other ideas describe a position in space, the surrounding environment, or a chemical substance used in chemistry, none of which capture the expressive channel used in art and communication.