B press a clean towel or cloth firmly against the cut. you don't want the bleeding to continue and don't want to make the cut worse by putting any liquid in a lab, like acid that could easily be mistaken as water.
        
             
        
        
        
The lungs are functioning to take carbon dioxide out of the body. Also known as exhaling.
        
             
        
        
        
They are both used to benefits plants growth process.
        
             
        
        
        
I believe the answer is c