Living : the fish
Non-living: is the rocks
I think it might be D Circulatory
<span>"He who has more toys wins." would be the correct statement to fit the frontier ethic.</span>
En.wikipedia.org<span>A measure of acidity or alkalinity of water soluble substances (pH stands for 'potential of Hydrogen'). A pH value is a number from 1 to 14, with 7 as the middle (neutral) point. Values below 7 indicate acidity which increases as the number decreases, 1 being the most acidic</span>