Biology- living and non living systems


     I don't know if we should distinguish between a living and non living system.  Everything has energy and that's what sticks in my mind.  I think of stones and would they be considered living or non living?  Are the elements ( fire, earth, air & water) living or non living?  I don't think it's a good idea to separate them because then we're not looking at the whole system. 
 

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