I would say communication, as neurons transmits messages from one part to another part of the body
        
                    
             
        
        
        
Answer: Hydrogen 
Explanation:
Because it is the element that everything is created with it is everywhere. All life has hydrogen in it, our air, SPACE, everything.
 
        
             
        
        
        
Your answer would be cumulus clouds.
        
             
        
        
        
Answer: To get rid of the week and let their kids not be weak.
Explanation: