You tried to play peek-a-boo with your 1-month-old nephew, but whenever you hid your face, he would cry. you try it again 6 months later, and now he laughs and enjoys the game, trying to uncover your face with his hands. your nephew has begun to develop .
(a) egocentrism
(b) object permanence
(c) hidsight bias
(d) conversation

B) Object permanence

When your nephew was younger he would cry when you covered your face. This is because in his mind if something is out of view/covered it means that it no longer exists. He cried because he believed that you "disappeared." As he gets older he develops object permanence. This is where he now understands that even if he can't see someone or something it still exists.

Hope this helped!

~Just a girl in love with Shawn Mendes

answer; implicit memories explicit;