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Why are some worms useful? They ______________.
A. live in intestines
B. make children grow healthy
C. eat dead plants and animals
D. take nutrients from the bodies of other organisms
Worms help to increase the amount of air and water that gets into the soil. They break down organic matter, like leaves and grass into things that plants can use. When they eat, they leave behind castings that are a very valuable type of fertilizer. Earthworms are like free farm help.
As important as they are alive for distributing nutrients and organisms and decomposing matter, worms are also very important in the food chain. They provide a crucial protein-rich source of food for other important species like birds, hedgehogs and frogs. Our underground allies are pretty amazing.
Answer
D.Take nutrients from the bodies of other organisms.
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