Answer:
his perception of depth has changed, he has realized that if he crawls along the cliff he may likely suffer a fall.
Explanation:
His behaviour was based on experimental findings of Visual cliff hypothesised by Gibson and Walk; that dept perception is inborn or innate and not acquired. The fact that he was not able to crawl across the visual cliff, at 10 months contrary to his ability to do so at 6 months, is an indication that his perception of depth, has changed. The evidence that he achieved this at 6 months without hesitation shows that the use of his sense of vision to perceive depth is innate, and not acquired.
