Give one
example of how bacteria maintain
equilibrium in the environment.

-Some produce organic compounds and some break down organic compounds.

-Bacteria are vital to maintaining the living world. Some are producers, others are decomposers, and others have human uses.

-Bacteria act as decomposers. They recycle the nutrients, such as breaking down a dead tree into simpler materials, thus helping out the ecosystem

the last 2 are the same i think but i hope this helps :D