What environmental condition do springtails prefer to infest buildings?

Springtails, also known as Collembola, thrive in environments that are consistently damp, which is why they prefer to infest buildings with constant high humidity. These tiny insects are often found in moist areas, and high humidity provides the ideal conditions for their survival and reproduction. In indoor environments, they are commonly associated with areas that have excessive moisture, such as bathrooms, kitchens, and basements.

While other conditions like low light and high temperatures may contribute to their presence in certain situations, the defining characteristic that attracts springtails to specific locations is the availability of moisture, which allows them to thrive and sustain their populations. This makes constant high humidity the most suitable answer in this context.