Answer;
-Development from the head down.
If a fetus's spine develops before its fingernails, this represents proximodistal development, characterized by development from the head down.
Step-by-step explanation;
-Proximodistal development is the progression of motor development radiating from the center of an organism to the periphery. The classic example is a child learning to move her shoulders before learning to control fine finger movement.
-Proximodistal development refers to growth and development that occurs from the head down. For example; an infant can use their arms (gross motor skills) to begin to reach for a toy before they can properly use their fingers (fine motor skills) to pick up the toy.