Proximity, similarity, continuity and closure are all __________

A) monocular cues for depth.
B) binocular cues for depth.
C) figure-ground principles.
D) Gestalt principles of grouping.

Proximity, similarity, continuity and closure are principles of grouping used in Gestalt psychology, referring to how the brain organizes and perceives visual stimuli as cohesive wholes. These principles help us identify separate objects within an image by applying organization and structure to otherwise disparate elements.