Answer:
Cephalo-caudal
Step-by-step explanation:
Cephalo-caudal is a physical development in children. This is the development that occurs from head to toe. This development started from its top point of the body to the down point of the body. It means that the brain and the head development occur first and then the rest of the body develops this development largely completed until adulthood in human beings. Other development also occurs during the life span.
Bay Kevin was developed on the principle of cephalo-caudal.