What environmental factors does the life of an earthworm depend on?

The earthworm is very common on our planet. It is important in nature as it creates fertile soil. But his life depends on various environmental factors. First of all, it depends on the temperature. Worms do not inhabit permafrost zones. Also, they do not live in sands and soil where there is nothing to eat. They breathe with the entire surface of the body. When rainwater floods their burrows, they cannot breathe, so the worms crawl to the surface. Because of this, they are called rainy ones, as they can be seen after the rain.