Mold inhabits everywhere in the natural world, but it is widely distributed in the soil and lives to decompose various things, and it lives like a plant.
Mold in your home lives in dark areas that are always damp and out of direct sunlight.
Mold also occurs on the ceiling, but this is caused by mold spores adhering to the ceiling along with dust in the air, and is propagated by a small amount of nutrients contained in the moisture in the air.
In addition, in bathrooms, it lives as a source of nutrients such as soap scum and nutrients when moisture from steam adheres to walls and ceilings.
In dry conditions, mold dries up and cannot grow. Therefore, mold breeding is often seen in places exposed to direct sunlight.