Body
You can pick up a rock. Any old rock from a creek bed or outcrop. Now try to find an exact match in size, color, having that little notch on one side. You can’t do it but you may get close if you spend enough time searching. One of the great wonders of Nature is how every thing and every creature is and has individual traits in spite of all the many things we hold in common. I draw correlations between plants and people every day to help folks understand plants better. Yet plants and people are not even close to being in the same biological categories as far as science is concerned. Still, we are both living creatures that have a life span, breathe air, and must have water, certain minerals, elements, etc., to stay alive. Every thing feeds on something else or the byproducts created by something. Plants eat dead stuff. Decomposing matter from all other things. That includes elements from decomposing rocks.