Answer:
If you mean as to where they are commonly found?
Explanation:
Fungi are decomposers that colonize most habitats on earth. They can thrive in the most hostile environments (ex; tundra). They prefer dark moist areas and are mainly found in forested areas on trees, forest floor, etc. where the environment in damp, dark, and covered in decaying material
Snails prefer ecosystems that are covered in areas for them to hide that are damp and provide them with a decent food supply. They mainly can be found in the upper leaf litter of forests, old fields, and wetlands but can also be found in more "disturbed" areas such as gardens/fields, river banks, etc.
Earthworms and those related to them live just about anywhere the soil is moist and there is dead plant material for them. The ecosystems they are most commonly found in though are rainy forests areas, anywhere on land, and in freshwater. All earthworm species need moist soil to live and survive.
Pill-Bugs live in a similar ecosystem to that of earthworms. They live just about anywhere there is moisture and dead plants for them to consume. Most commonly they are found in forests and other humid habitats. They are reliant on humid conditions to survive therefore being the reason you often find them in forests or under rocks
