Final answer:
Chuck Close is the only one among the mentioned artists who is described as a Photorealist.
Step-by-step explanation:
Photorealism is an art movement that aimed to create paintings that closely resemble photographs. Among the artists mentioned, the only one who is described as a Photorealist is Chuck Close. Close used photographs and intricate grids to create highly detailed and precise paintings that mimic the look of a photograph. The other artists mentioned, such as Pablo Picasso, Leonardo da Vinci, and Jackson Pollock, do not fall under the category of Photorealists.