The best term to describe how the monocular depth cue of occlusion works would be overlapping.
Option A is correct.
Recent experiments have shown that the monocular region caused by the obstruction of one object by another contributes to stereoscopic depth perception. It has been suggested that the main role of monocular occlusion is to define depth discontinuities and object boundaries with depth.
Monocular depth cues are retinal image information that provide information about depth and distance, but can only be derived from a single retina (or eye). In everyday life, of course, we recognize these signs with both eyes, but we can use them with just one functioning eye.
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