Where are roundworms useful in an ecosystem?\nOptions:\n- (A) killing animals\n- (B) soils\n- (C) fields\n- (D) bacteria\n- (E) eating plants\n- (F) wetland\n- (G) food\n- (H) alveoli Let's be accurate as possible.
User
Roundworms make up the phylum Nematoda. Also, nematoda and rotifera are important groups contributing to soils. Roundworms make important contributions to soils.
The final answer: (B).
Assistant