Answer:
C. Darwin performed an experiment that supported his hypothesis. 
Explanation:
Darwin believed that his experiment, which was comparing the finch's beaks from Galapagos Archipelago, in which there was variation between the size and shape of beaks, as the basis in which he believed evolution was correct. However, variation does not mean evolution, and evolution, in which it calls for a chain of events to create beneficial traits successively, is nigh impossible to occur in the real world. Again, that is not to say that there is no such thing as variation, in which there is, in which people or animal groups adapt to their natural habitat. However, to state that adaptation is proof that a species becomes another is to go out on a limb, and current failures of "new species" (in that it originates from today's day and age, rather then <em>discovered</em>) to emerge is proof of such. 
 
        
             
        
        
        
Answer:
CO₂, also known as carbon dioxide
Explanation:
In the alveoli, oxygen enters the bloodstream, and carbon dioxide exits, the latter to be exhaled from the lungs.
 
        
             
        
        
        
C.  flower plant and a bee
        
             
        
        
        
Water and ATP energy
where carbon dioxide is a waste product and is released into the atmosphere.