Answer:
D, organisms that survive long enough to reproduce.
Explanation:
C and D are the best answers. Adaptations and skills other than speed and strength contribute to an organism's survival too, so that means it isn't C. Natural Selection is about how an organism must have useful traits to survive to reproductive stage and  successfully reproduce, so it would definitely be D.
Please Mark Brainliest! I need nine to level up.
 
        
                    
             
        
        
        
One Y and one X chromosome.
        
             
        
        
        
Natural selection<span> and selective breeding can both cause changes in animals and plants. The </span>difference between<span> the two is that </span>natural selection<span> happens naturally, but selective breeding only occurs when humans intervene. For this reason selective breeding is sometimes called </span>artificial selection<span>.</span>
        
             
        
        
        
Answer:
A covalent bond forms between two Nonmetals!
Explanation:
A covalent bond always forms between the electrons of two Nonmetals.
hope it helps!