Answer:
Animal by-products.
The USDA (United States Department of Agriculture) defines an animal product as anything made from an animal, excluding muscle meat.
 
        
                    
             
        
        
        
The answer is number 3 because the species has to adjust rapidly to change their environment.
        
                    
             
        
        
        
I think the answer here is neurons, the nerve cells
        
             
        
        
        
Answer:
Visceral motor
Explanation:
Peripheral nervous system is divided further into visceral and somatic nervous system. Somatic nervous system controls the skeletal muscles, joints and tendons. Visceral nervous system controls cardiac muscles, glands and smooth muscles. 
Large intestine has smooth muscles so it is controlled by the visceral nervous system. It has further two divisions, sensory and motor. Sensory division carries signals from the muscle to the central nervous system whereas motor division carries signals from the central nervous system to the muscle which cause an action. Hence, visceral motor division carries signals to the smooth muscle in the large intestine.
 
        
             
        
        
        
Standard deviation, really hope this helps you out :)