The best criterion for evaluating the piece of art would depend on the specific focus and intention of the artwork in question. However, if we consider the responses provided, "use of color to emphasize a particular area of the drawing" is often a critical element in many pieces of art, as color can significantly affect the viewer's response and the overall message of the piece.
Thus, if the artwork in question employs color in a way that draws attention to particular elements, this would be an important aspect to evaluate. However, without more context about the artwork itself, selecting a single criterion can be challenging.
If you're looking for a singular answer based on versatility and common use in evaluations, "use of color to emphasize a particular area of the drawing" may be the most applicable choice.