The presence of earthworms ____.

A) increases free nitrogen in the environment
B) reduces the presence of parasitic flatworms
C) results in sandier soil
D) increases crop yields
E) decreases native biodiversity

Earthworms

Invertebrate animals belonging to the phylum Annelida, known for their role in aerating the soil and enhancing soil fertility.

Crop Yields

The measure of productivity of a crop within a specific area, often influenced by factors like weather conditions, soil quality, and farming practices.

Free Nitrogen

Atmospheric nitrogen (N2) that is not bound in compounds and is inert due to its strong triple bond, making it unavailable to most organisms unless fixed.