Kool if you know what I mean
The answer is A.
Why: The heart is part of an organism, so that doesn't exactly count. Soil is not alive, and neither is clay. Therefore, Bacteria must be it. Bacteria is a living thing, and can function by itself.
Answer:
Organic molecules produced from spontaneous synthesis or from meteorites
Explanation:
I think it is keystone. If they were not there the population of urchins would go up and the kelp would go down.
