A scrubber uses water to remove smoke from burning coal.
        
                    
             
        
        
        
Selective logging—the practice of removing one or two trees and leaving the rest intact—is often considered a sustainable alternative to clear-cutting, in which a large swath of forest is cut down, leaving little behind except wood debris and a denuded landscape
        
             
        
        
        
A 
Explanation:
it’s the one that makes the most sense !
        
             
        
        
        
you answered your own question??? what