Answer:
Autonomic nervous system.
Explanation:
Autonomic nervous system may be defined as the division of the peripheral nervous system. Autonomic nervous system has been divided  into  parasympathetic nervous system and sympathetic nervous system.
The autonomic nervous divides is involved in controlling the respiration activity, digestive system and cardiovascular activity. This efferent nervous system controls the different type of the muscles like cardiac muscle, smooth muscle and the functioning of glands.
Thus, the answer is autonomic nervous system.
 
        
             
        
        
        
The answer is B) Perissodactyls
        
             
        
        
        
When you shiver, that's actually how you help yourself stay warm! It's your immediate instinct reaction to do so when you're cold, so there will be more heat produced, and they occur by your muscles moving. =)
        
             
        
        
        
Answer:
meee lol I need friends <3