Answer:
b. spinal cord is the correct answer.
Step-by-step explanation:
Spinal cord is a part of the nervous system transports information between the brain and other parts of the body.
The spinal cord is a tubular and thin structure composed of nervous tissue.
The spinal cord functions are to the transmission of neural signals among the brain and other parts of the body.
Spinal Cord is necessary because the brain communicates with the body through it.
Thus the brain sends information by the spinal cord to the peripheral nerves everywhere to the body that serves to regulate the muscles and inner organs.