You Are Standing in the Middle of a Field of Long

Multiple Choice

You are standing in the middle of a field of long, tall grass and flowers. When you look at your feet and at the area immediately around you, you can see great detail and pick out all the individual pieces of foliage. However, when you look up in the distance, the grass and flowers lose detail and begin to merge together. This phenomenon involves the pictorial depth cue of

A) texture gradient.
B) linear perspective.
C) relative size.
D) relative motion.