The answer is C. Final consumers. The reason for this is because earthworms, bacteria, and fungi all consume dead organic material. Their basically the garbage men of the ecosystem.
Mutations are random Mutations can be beneficial, neutral, or harmful for the organism, but mutations do not “try” to supply what the organism “needs.”
The micro organisms are found in <em><u>hot springs </u></em><em><u>soil </u></em><em><u>snowfield beneath earth rocks inside roots swamps water... </u></em>