Stacy is participating in a local psychology experiment in which the research assistant asks stacy to hold two pencils in front of her and touch the tips together. she then asks stacy to do this with one eye closed. stacy finds this terribly difficult, which demonstrates the importance of:

This demonstrates the importance of binocular cues. This demonstrates binocular cues because putting two pencils together with both eyes open is not too difficult but once you only use one eye, the task becomes much more difficult. Thus, binocular cues are important because they make many tasks, including this one, much easier.