Achild's inability to understand that undoing a sequence of events will bring about the original situation is called ""

The answer is irreversibility. In addition, irreversibility is incapability in a child to contemplate over a sequence of proceedings or mental processes and then psychologically converse the steps. The irreversibility is one of the features of behaviorist Jean Piaget's preoperational phase of his theory of child improvement in which refers to the incapacity of the child at this phase to comprehend.

the answer is a wheel