The answer could possibly be natural selection or survival of the fittest
        
             
        
        
        
Answer:
Red blood cells makes up your body
 
        
             
        
        
        
- <span>In the </span>photic zone<span>, </span>there<span> is light, so vegetal </span>organism<span> (micro and macro algae) ... is accumulated, </span>there<span> is less Oxygen and the pH is lower </span>than<span> in the </span>photic zone<span>. ... which is a structure in the eyes that reflect the incoming ligh</span>
        
             
        
        
        
 Industrial Age!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
        
                    
             
        
        
        
Answer:
The correct answer is sodium.
Explanation:
First of all sodium do not act as a functional group and second sodium has high tendency to form bond with high electronegative element.Carbon is not an electronegative element.
  The other mentioned functional groups in the question such as hydoxyl group,phosphate group and carbonyl group can easily form bond with carbon atom.