Greg is 10 months old, and he refuses to crawl across the visual cliff even though his mother is encouraging him to do so. when he was 6 months old, he squirmed across it without hesitation. what has changed for greg?

The perception of depth of Greg has developed

Explanation:

The perception of depth of babies, which started to develop in the 6th month, completes its development to a great extent from the tenth month. Depth perception protects Greg from accidents such as crashing around objects or falling down stairs. Therefore, he refuses to crawl across the visual cliff.

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