$(i)$ Differentiate between sensory neurons and motor neurons.
$(ii)$ How is the brain protected in our body?
$(iii)$ Name the part of the brain responsible for the precision of voluntary actions and maintaining body posture and balance of the body.

(N/A) $(i)$ Sensory neurons carry impulses from receptors to the central nervous system. Motor neurons carry impulses from the central nervous system to effectors (muscles or glands).
$(ii)$ The brain is protected inside a bony box called the cranium (skull). Inside this skull,the brain is cushioned within a fluid-filled space containing Cerebrospinal Fluid $(CSF)$,which acts as a shock absorber to protect the brain from mechanical injury.
$(iii)$ The part of the hindbrain responsible for the precision of voluntary actions and maintaining body posture and balance is the cerebellum.