Final answer:
Joint proprioceptors send information about body position and movement to the brain, particularly the cerebellum and other cortical regions, for processing and coordination of muscle activities.
Step-by-step explanation:
The information from joint proprioceptors is sent to the brain. These sensors, present in muscles, joints, skin, and tendons, collect data concerning the body's position and movement. The muscle spindles, for example, are stretch receptors that inform the brain about muscle lengthening, and Golgi tendon organs are tension receptors that detect the force of muscle contractions. The proprioceptive and kinesthetic signals travel up from the limbs through the spinal cord to the cerebellum and other cortical regions, which are integral for the coordination of muscle activities and overall body balance.
The correct answer to the student's question is b) Brain.