Answer:
B.
Sleep is a state of consciousness.
Explanation:
By definition, speel is: "a condition of body and mind such as that which typically recurs for several hours every night, in which the nervous system is relatively inactive, the eyes closed, the postural muscles relaxed, and consciousness practically suspended".
You may say that the sleep is a natural state of mind and body, that is recurring and characterized by the alteration of consciousness. When sleeping, we also experience reduced or non existent interactions with surroundings, relatively inhibited sensory activity, and inhibition of nearly all voluntary muscles.
