Answer:Assimilation
Explanation:Assimilation is a cognitive process in which we relate the new learned infomation to the preexisting Information. It is a concept suggested by Piaget on cognitive development in children , children are always learning new information in order to develop their knowledge and if 4 year old has learned what a whistle is and what sounds it makes , they are likely to associate anything that makes the similar sound to a Whistle.