I believe its D. It becomes more difficult for the cell to get enough oxygen and nutrients.
        
                    
             
        
        
        
Answer:
technical of plants living on the land or on the ground,so floppy plant.
 
        
             
        
        
        
Answer:
Melting mountain glaciers
Explanation:
This is the answer because some of our fresh water is in ice caps/glaciers so we will loose fresh water and we will not have fresh water to drink so the planet earth will not have water.
 
        
                    
             
        
        
        
D - All of the above 
because a machine can do all of those things.