Answer:
A. Bacteria break down dead matter and wastes, releasing nutrients into the soil
In this way, the composition of soil and abiotic factor, rely on living things
Step-by-step explanation:
Ecosystem is affected by the abiotic factor as well as biotic factors. Plant, Algae, fungi, bacteria and protists are example of biotic factor. Water, soil, sunlight, air and temperature are the example of abiotic factor. Bacteria play a vital role to keep our soil healthy as well as productive. Bacteria can reproduce very much faster when they get proper environmental conditions. It is one of the major class of microorganisms. Bacteria also helps in providing sufficient nutrients to the soil.