Answer:
My best answer is domaint  hope this helps
Explanation:
 
        
                    
             
        
        
        
A chemical reaction is a process in which one or more substances are changed into new substances. 
An example of a chemical reaction is when metal rusts.
        
                    
             
        
        
        
Consists of cranial and spinal nerves carrying impulses to and from the brain and spinal cord