Answer:
Sensory neurons are the nerve cells that are activated by sensory input from the environment
Cranium's primary function is to provide protection and structure.
The vertebral column's primary function is to form the central axis of weight-bearing and supports the head as well as transfer the weight of the trunk and abdomen to the legs.
Motor neurons are cells in the brain and spinal cord that allow us to move, speak, swallow, and breathe by sending commands from the brain to the muscles that carry out these functions.