Question

down organic matter and returning nutrients to the environment. what role do free-living nematodes play in the enviornment? primary producer decomposers tertiary consumer

Explanation:

Free - living nematodes help break down organic matter and return nutrients to the environment. Primary producers (like plants) make their own food, and tertiary consumers are top - level predators. Decomposers break down dead organic material, which matches the role of free - living nematodes.

Answer:

B. Decomposers