Concept:The retina is a sensory receptor that sends visual signals to the brain; the cochlea is the analogous sensory receptor for hearing.Explanation:In vision, light falls on the retina, which generates nerve impulses that travel to the brain for processing.In hearing, sound vibrations are detected by the cochlea inside the ear.The cochlea converts these vibrations into nerve impulses that are sent to the brain.Therefore, the cochlea is related to the brain in the same way the retina is related to the brain.Answer:B. cochlea and the brain