Which insect is likely to be found in moist areas of a bathroom?

Silverfish are commonly found in moist areas, such as bathrooms, due to their preference for humid environments. They thrive in conditions where humidity levels are high, which is often where water is present, such as near sinks, tubs, and showers. Silverfish feed on materials that are rich in carbohydrates, such as paper, glue, and even some types of fabric, which can also be found in bathrooms. Their nocturnal habits and elusive nature make them less visible during daytime, but they are often encountered in places where moisture is prevalent.

In contrast, while flies may occasionally be seen in bathrooms, they are more commonly associated with decaying organic matter rather than moisture alone. Wasps typically build nests outside and usually prefer dryer areas; they are not primarily drawn to indoor bathrooms. Moths are generally attracted to pantry items or fabrics but are not specifically associated with the damp conditions of bathrooms. Hence, silverfish is the most fitting choice when considering the insect best suited for moist areas within a bathroom setting.