Question

to gain information on objects we need both eyes for _______.
retinal disparity
binocular cues
proximity
convergence

Explanation:

Binocular cues are visual information obtained from both eyes that help in depth perception and gaining information about objects. Retinal disparity is a type of binocular cue, but the question asks for the general concept of what we need both eyes for, which is binocular cues. Proximity is a monocular cue (using one eye), and convergence is also a type of binocular cue but more specific, while the broader category here is binocular cues.

Answer:

B. Binocular Cues