Final answer:
A flat work of art has two dimensions: height and width. Depth is a property of three-dimensional works like sculpture, while 2-D artwork can only simulate the illusion of depth through artistic techniques.
Step-by-step explanation:
The question is related to the dimensions of a flat work of art. In two-dimensional art forms such as drawing and painting, the artwork has two dimensions: height and width. This means that a flat work of art has two dimensions: height and width. Depth, on the other hand, refers to the third dimension and is associated with three-dimensional works such as sculpture, which has height, width, and depth. Artists can create the illusion of depth in a two-dimensional piece through techniques like perspective, but the artwork itself does not have actual depth.