5. to B.  3. to E.  2 to A. 1. to D. 4. i believe is C.
        
             
        
        
        
The shorter the food chain, the larger amount of energy obtained. 
Hence, the consumer furthest away from the producer obtains the least energy. 
The quaternary consumer is furthest away. Most energy is lost by then. Hence, it has access to the smallest supply of energy.
        
                    
             
        
        
        
Answer:
b, this is because a consumer, is something that consumes something, and the clam consumes the energy and nutrients when it filters the particles in from the water. Because it consumes these, it is a consumer for that reason. So, the answer is b. Hope this helps!!!