Answer :
Bacteria in soil feed on organic matter
Option A is correct.
What is organic matter and examples?
Organic matter is anything that contains carbon compounds that were formed by living organisms. It covers a good range of things like lawn clippings, leaves, stems, branches, moss, algae, lichens any parts of animals, manure, droppings, sewage sludge, sawdust, insects, earthworms and microbes.
Why is organic matter important?
Soil organic matter may be a primary source of carbon (C) which gives energy and nutrients to soil organisms. This supports soil functionality because it improves the activity of microorganisms within the soil and it can enhance biodiversity.
What is organic matter made of?
Organic matter consists mainly of the living organisms within the soil (“the living”), the fresh residue (“the dead”), and therefore the well-decomposed (or burned) material physically or chemically protected from decomposition (“the very dead”).
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