Answer:
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The relationship between  the  hermit crabs and the snails  is  A.commensalism
Why? Commensalism refers to a relationship where one organism benefits  from the other without  affecting it. In this case, the hermit crab benefits from the  snails, via the latter's discarded shells. The crab's use of the  snails' shells has no impact on the  snails.
        
             
        
        
        
As light intensity increases, the rate of photosynthesis increases. As the intensity decreases, so does the rate of photosynthesis 
        
                    
             
        
        
        
Explanation:
Genetic evolution is the meaning of biologic life, in that it is the why and how of it, as well as the stock of future biological existence. The genes that survive -- and in turn the organisms they make -- are the winners in the existence game. ... We owe our existence to this process, and our future depends on it.
 
        
             
        
        
        
It's a region of DNA that binds DNA Polymerase to begin replication.