Answer:
integumentary, muscular, skeletal, nervous, circulatory, lymphatic, respiratory, endocrine, urinary/excretory, reproductive and digestive
Explanation:
Been doing this for a while
 
        
             
        
        
        
I think it C hope this helps
        
                    
             
        
        
        
It is the first option. Atmospheric nitrogen is very stable so there fore hard to react with. But bacteria contain molecules that can break the bond of nitrogen.