I think the answer is A, to train organisms to breed more successfully.
Fungi and bacteria are primary decomposers whereas plants and trees are producers and animals are consumers
Answer:
Plants take nitrogen from the soil by absorption through their roots as amino acids, nitrate ions, nitrite ions, or ammonium ions. Plants do not get their nitrogen directly from the air. ... Plants get the nitrogen that they need from the soil, where it has already been fixed by bacteria and archaea.