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 windmill collects energy from the wind
 
        
                    
             
        
        
        
Energy is lost at each trophic level.
        
             
        
        
        
Answer:
E. The length of cells in the elongation and mature zones would be larger in the control group.
Explanation:
The length of cells in the elongation and mature zones would be larger in the control group this is because of the increase in the solute concentration of the hydroponic growth medium which excluded the roots. 
This reduces the amount of water that moves into the root system of the plants and nutrients which imitate drought conditions, this imposed drought leads to a decrease in the plant growth.