Final answer:
Color-field painting is an example of a painting where line and color are freed from their bondage to the imitation of nature.
Step-by-step explanation:
The artist is referring to color-field painting as an example of a painting where line and color are freed from their bondage to the imitation of nature and allowed to exist for themselves. Color-field painting is a style of abstract art that focuses on large areas of solid color, divorced from specific context, and emphasizes the interactions of color as the most important element. Artists like Mark Rothko, Clyfford Still, and Barnett Newman are associated with color-field painting.