Imagine That You Are Standing on a Pair of Railroad

Multiple Choice

Imagine that you are standing on a pair of railroad tracks. As you look down at your feet, the tracks look a certain distance apart. As you lift your head and watch the tracks move away from you, they appear to get closer together until they converge at the farthest point. This bit of visual trickery is called

A) ​the texture gradient.
B) ​the linear perspective.
C) ​the retinal disparity.
D) ​the visual cliff.