If the perspective lines are correct, but distant objects are as clear as nearby objects, what is missing?

Correct answer: Atmospheric depth

Correct answer: A, atmospheric depth. Perspective does not depend only on lines that become smaller toward the distance. In a convincing landscape, distant objects are usually shown with less sharp detail, weaker contrast, and often lighter or slightly less intense colours because air lies between the viewer and those objects. This visual change is called atmospheric or aerial perspective. A is correct because the question says the perspective lines are already correct, but the distant objects still look equally clear. B, hue, means the basic colour family, such as red or blue; changing hue is not the main requirement here. C, symmetry, means matching arrangement on two sides and is unrelated to distance. D, actual texture means the physical surface quality of an object; a drawing can suggest distance without adding real texture. Memory cue: linear perspective changes size and position; atmospheric perspective changes clarity, contrast, and colour strength.