Which type of tissue would make up the majority of the brain and spinal cord?

It is the Nervous tissue. The nervous system is comprised of the spinal string and cerebrum and is the focal handling community for all jolts. Fringe sensory tissue comprises of nerves made up of nerve cells called neurons. Nerves broaden everywhere throughout the body, from the tips of the fingers to inward organs.

The answer is nervous tissue. The nervous tissue or nerve tissue is the chief tissue constituent of the two portions of the nervous system which is the brain and spinal cord of the central nervous system and the branching peripheral nerves of the peripheral nervous system which normalizes and controls bodily purposes and action.