Earthworms are small, soft-bodied creatures that live in the soil. They play a vital role in nature by breaking down organic matter, which helps enrich the soil. As they burrow through the ground, they create tunnels that allow air and water to reach plant roots, promoting healthy growth. Earthworms are often found in gardens and fields, making them essential for farmers and gardeners alike. These fascinating animals have no eyes but can sense light and vibrations. They breathe through their skin and are mostly made up of muscle and water. Earthworms belong to the group of animals called annelids, which also includes leeches.