A (positive) shape in <u>negative plane</u> is the same as a figure/ground relationship.
Explanation:
In design, everything can be classified as either figure and background. Their relationship is complimentary. So it is the same as a positive shape in negative plane.
The relationship between positive shape and negative space sometimes called figure/field, figure/ground, foreground/background, or solid/void relationship.
Answer: C. artists and observers have varying ideas of what art is.
Explanation: Everyone has varying opinions on what is classified as art. The subject matter is often taboo as artists try to push the limits and test boundaries.