Your answer would be the Chinese Cultural Revolution.
During that time, students could've joined the Red Guard, where they not only denounced their teachers, but also their friends and family. They also raided peoples' homes and took their belongings.
What you're seeing in the picture are three members of the red guard, which you can tell from their arm-bands.
Since, Sally, a nine-month-old can retrieve her ball when her mother hides it under a blankets, she has known Object Permanence.
<h3>What Is Object Permanence?</h3>
Object permanence serves as a term that describes the understanding of how items and people still exist even when one can't see or hear them.
Therefore, since the girl can know where the ball was hide , she was mastering Object permanence.
Learn more about Object Permanence at;
brainly.com/question/5589531
