The correct answer is B) Object permanence.
The other options of the question were A) accommodation. C) deferred imitation. D) shaping.
Elliot left his backpack on the bus to school this morning. Even though his backpack is not at school with him, he still knows it exists on the bus. This demonstrates Piaget concept of object permanence.
Jean Piaget developed an important concept that is called "Object permanence." This refers to the ability a child has to know that although an object is not with the child, the object still exists. This concept is part of the Cognitive Development theory, proposed by Jean Piaget.