An infographic is an image created to represent, instruct, or deliver information in a visual format.

The correct answer is D. infographic.

An infographic is specifically designed to represent information visually, combining images, charts, and text to make complex data more understandable and engaging. The other options (visual wave, sound wave, and channel) do not relate to the definition of an infographic. If you have more questions or need further explanations, feel free to ask!