because they create tunnels in the soil which makes air pass through
Earthworms make soil healthy by going underground
Because earthworms eat just about every other organism in the soil.
they fertilize the soil
No, but the earthworms in the soil reproduces.
The answer is that earthworms help to build soil and fertilize
earthworms
they add fertility to the soil
they live in rachin soil
Earthworms help decompose organic matter in compost heaps and in the soil.
Earthworms.
soil,dirt
Earthworms are an important part of the soil environment, and the growth of plants. Oil is deadly to earthworms.