The answer is D, a piece of a chromosome
        
             
        
        
        
I got no clue maybe it a secret
        
             
        
        
        
The leaves are what usually absorb the sunlight 
 
        
                    
             
        
        
        
If there is an environmental or selective pressure it will contribute to the evolution of an organism by giving an adnantage to the organisms of a population who have a trait which allows them to survive that change. The advantageous genes will be passed on and the number of organisms with the desirable feature will increase over time, however the number of organisms that lack the characteristic will decrease over time. This is evolution by natural selection.