Answer:
The bones of the skull and spinal column
Explanation:
The central nervous system is better protected than any other system or organ in the body. Its main line of defense is the bones of the skull and spinal column, which create a hard physical barrier to injury.
Answer:
It is based on testable and replicable evidence.
EM is created by moving charges back and forth will produce oscillating electric and magnetic fields, and these travel at the speed of light
