In the context of the 'Principles of Development' in the study of child development, which of the following statements provides the most accurate and comprehensive scientific explanation of the 'Principle of Directionality' of development?

There are two universally accepted and important rules of the direction of development in child development: first is the 'Cephalocaudal sequence', according to which development proceeds in the direction from head to toe (an infant learns to control their head first), and second is the 'Proximodistal sequence', under which development starts from the center of the body and moves outward (i.e., from the spine toward the hands and fingers).