According to piaget's theory, children tend tobelieve that once an act has been done, it cannotbe "undone", a belief structure called achild may fail to recognize that something cansometimes be restored to the way it was before achange occurred.

Irreversibility is the correct answer.

According to Piaget's theory, irreversibility is a belief structure whereby a young child thinks that, once an act is done, it can't be undone. A child in the pre-operational stage may fail to recognize that sometimes things can be restored to the way they were before.

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

debating and finalizing the detail of the policy