When light reaction occurs in the stroma of chloroplast glucose is produced
        
             
        
        
        
Mitochondria produce ATP, energy that is vital in aerobic cells. Therefore, I believe this is why they can be considered as power plants.
        
             
        
        
        
Your answer would be A. Phosphorus
 
        
                    
             
        
        
        
I believe the answer is restriction organism.