Answer:
I don't know what is the answer 
Explanation:
b 
 
        
             
        
        
        
Answer:
cleaning
Explanation:
If people would clean up after themselves, the world's rivers and lakes would be clean. Water pollutants can be somewhat easy to remove by taking the trash out of them.
 
        
             
        
        
        
Thus, light energy is initially converted to chemical energy in the form of two compounds: NADPH, a source of energized electrons ( "reducing power"); and ATP, the versatile energy currency o that the light reactions produce no sugar; that happens in the second stage of photosynthesis, the Calvin cycle.
        
             
        
        
        
Answer:
A. It is a source of genetic variation