The answer would b a so the top person is correct:))
        
             
        
        
        
Answer:
The answer is "form only at boundaries between two continental plates." :)
 
        
                    
             
        
        
        
"cutting down trees to build new buildings and roads", "factory and automotive emissions causing acid rain" and "redirecting and storing freshwater behind dams" exemplifies a way in which humans modify ecosystems. The correct option among all the options that are given in the question is the last option or the fourth option.
        
                    
             
        
        
        
Plants make their food in their leaves. And need sun for this process, so smaller and fewer leaves means less sun for photosynthesis, and it also means less food to nourish the plant.