Why are pillbugs found in wet/moist environments?

Pillbugs, or Armadillidiidae, are a family of woodlice that have the unusual ability to roll into a ball. They are attracted to dark, damp environments for two main reasons: sustenance and food.

Pillbugs consume a variety of dead and decaying organic material, including moss, algae, and fungus bark. Since these are typically found in moist environments, it makes sense that they would be found close to them. https://tutor.hix.ai

Pinch bugs are found in damp and dark environments for another reason: although they have adapted to live on land, their body anatomy is still very much tailored towards the water. If they are in a sunny or hot place for an extended period of time, they dry out and die. Pinch bugs are actually a type of land crustacean.

I hope I was of assistance.

Pillbugs require high humidity for respiration through gills. Dry environments can lead to desiccation and affect their survival.