For the environmental risk, it is much better to prevent pollution than to deal with it after it has already been made. When you deal with the pollution, it is hard to say that you can eliminate completely. So, prevention is the first strategy.
        
                    
             
        
        
        
Pretty sure the answer is B as erosion happens from weather or rain
        
             
        
        
        
Answer:
you wanna know what that is its atoms lots and lots of atoms and if you want to learn about something smaller than an atom learn about quantum physics 
Explanation: