In what way do microorganisms maintain the health of ecosystems? help plss

Microorganisms recycle nutrients. Decomposers break down organic matter of dead plants & animals. Some bacteria living on the ocean floor feed on oil that seeps from the ground.

Microorganisms recycle nutrients. Decomposers break down organic matter of dead plants & animals. Some bacteria living on the ocean floor feed on oil that seeps from the ground.

Explanation:

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.