The answer is none of the above because organic materials, gasses, and minerals are all component soils.
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I believe that an adjuvant is a chemical addictive that increases the effectiveness of vaccines. It is a pharmacological or immunological agent that modifies the effect of other agents. It may be added to a vaccine to modify the immune response by boosting it such as to give a higher amount of antibodies and a longer lasting protection, and hence minimizing the amount of the foreign material or vaccine injected.
D. Fungi
The kingdom Fungi includes a vast variety of organisms such as mushrooms, yeast, and mold.
Yes there is, there is the cycle which trees and plant organisms produce oxygen, and homes animal organisms which can be beneficial to decomposition and other things.
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