If the muscles of one eye are paralyzed, making it impossible to change the point of focus of that eye, which kind of depth cue will become unavailable? a. linear perspective b. disparity c. occlusion d. motion parallax

The best and most acurate answer for this is definatlly b 

due to d dealing with speed

c is loss of vision 

and a is something to do with how we see things that go on for a while in art like a hallway falling into a single point like in art

The answer is constant.