What is the role of line in understanding negative space?

Correct answer: It clarifies the boundary between the figure and the empty area

Direct answer: D. Negative space is the empty area around, between, or sometimes inside figures and objects. A line can mark the edge of the subject, making it easier to see where the positive figure ends and the surrounding empty area begins. By noticing this boundary, the learner can study the shape of the empty area as carefully as the object itself. A is wrong because line may surround colour, but it does not primarily explain colour quality. B is wrong because lines have many visual uses beyond forming letters. C is wrong because a line usually helps reveal or define the subject rather than always hiding it. D is correct because it describes the relationship between figure and empty space. Memory cue: draw the object’s edge, then observe the shape left outside it.