The answer is object permanence.
Object permanence refers to the ability to understand that an object is still present and physically exists even if it is hidden out of sight. In this example, your niece lacks object permanence since she does not understand that you are behind the blanket even though you cover yourself with it or you are temporarily.
AFRICANS Americans mate. A thanks would be appreciated.
The causes of the war was that the British decided to make american colonies pay a huge part of the war debt from the from the French and Indian war with the sugar act,Stamp act,and more taxes.