5) muscles work in pairs to move bones
        
             
        
        
        
I think the answer is C because at the first the DNA shows the copies of itself when it replicate n then it transcripts n transfer the coded message for protein synthesis from DNA onto mRNA n then it translates From the cytoplasm wher the RNA enters when it translate the part of protein synthesis from the time of amino acids are assembled in a particular sequence...The transcription happens from a nucleus
        
                    
             
        
        
        
Activation energy is the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction. 
 for example , striking a match on the side of a matchbox provides the activation energy, in the form of heat produced by friction.
        
                    
             
        
        
        
This uses the suns energy instead of using fossil fuels. For instance solar panel.
        
                    
             
        
        
        
Answer:  "symbiosis" ;  or,  a "symbiotic relationship" .
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