Terrestrial mollusks are a diverse group of soft-bodied animals that primarily live on land. They belong to the class Gastropoda, which includes snails and slugs. These creatures have adapted to terrestrial life by developing a lung-like structure for breathing air, and they often have a coiled shell for protection, although some, like slugs, lack a shell. These mollusks play important roles in ecosystems as decomposers, helping to break down organic matter. They can be found in various habitats, including forests, gardens, and grasslands. Terrestrial mollusks also serve as food for many animals, contributing to the food web in their environments.