Answer:
Explanation:
Catalyst is a substance that influences the reaction but does not participate in the reaction 
 
        
                    
             
        
        
        
The type of operations used for transforming plaintext to cipher text, the number of keys used, and the way in which the plaintext is processed.
        
             
        
        
        
It is body composition!   Np Welcome :P
        
             
        
        
        
I think the correct answer is a