1)Plant, Fish, Coral (i think coral)
2)Rocks, Water
3)Plant-Releases Oxygen Into Water
4)Plant-Releases Oxygen Into Water for the fish to breathe
5)Water-Helps Plant Grow
        
                    
             
        
        
        
The correct answer to the question that you asked is D
        
                    
             
        
        
        
Answer:
Grass
Explanation:
The higher up you go in a food chain, the less energy available and the more you have to use to acquire energy.
 
        
                    
             
        
        
        
Answer:
D, C and A are the correct options. 
B is less likely rather is a personal reference.