Final answer:
An artist can demonstrate space or perspective in a work of art through various techniques, such as linear perspective and atmospheric perspective.
Step-by-step explanation:
An artist can demonstrate space or perspective in a work of art through various techniques. One of the most common techniques is the use of linear perspective, which creates an illusion of depth and three-dimensional space on a flat surface. This is achieved through the use of a horizon line and vanishing points. Another technique is the use of atmospheric perspective, which creates the illusion of depth by making distant objects appear less detailed and lighter in color. An artist can also use the positioning and overlapping of objects to create a sense of space and depth.