Which best compares the roles of nitrogen-fixing bacteria and certain decomposers in the nitrogen cycle?
1) Nitrogen-fixing bacteria convert atmospheric nitrogen into a usable form, while decomposers break down organic matter and release nitrogen back into the soil.
2) Nitrogen-fixing bacteria break down organic matter and release nitrogen back into the soil, while decomposers convert atmospheric nitrogen into a usable form.
3) Nitrogen-fixing bacteria and decomposers both convert atmospheric nitrogen into a usable form.
4) Nitrogen-fixing bacteria and decomposers both break down organic matter and release nitrogen back into the soil.
