Activation energy - is the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.
        
             
        
        
        
Answer:
Organic Process: a natural process occurring in living organisms
 
        
             
        
        
        
C, population, is not a formal taxonomic category
        
             
        
        
        
Its phytoplankton release oxygen its a long process on how though