Which of the following is composed of nerve fibres that mediate reflex actions and that transmit impulses to and from the brain?

Correct option is C

The correct answer is (c) Spinal cord.
· The spinal cord is a vital part of the central nervous system composed of nerve fibres that mediate reflex actions and transmit impulses between the brain and the rest of the body. It is responsible for coordinating reflexes and relaying sensory and motor information.

Information Booster:
· Heart: The heart is a muscular organ responsible for pumping blood throughout the body via the circulatory system.
· Rib cage: The rib cage is a bony structure that protects the heart and lungs, supporting respiration.
· Muscles: Muscles are tissues that produce movement by contracting and relaxing.