Respuesta :
The answer is B) a thick bundle of nerves.
Spinal cord is a cylindrical bundle of nerve fibers and associated tissue which enclosed in the spine and connects nearly all parts of the body to the brain, with it forms the central nervous system.
Spinal cord is a cylindrical bundle of nerve fibers and associated tissue which enclosed in the spine and connects nearly all parts of the body to the brain, with it forms the central nervous system.