Which location serves as a common habitat for fleas?

Fleas are parasites that commonly infest areas where their hosts—primarily mammals—are present. The nets of beds and animals serve as an ideal habitat for fleas because these locations offer ready access to their blood meals. Fleas thrive in warm, dark environments, and bedding or animal nets provide both shelter and proximity to hosts, facilitating their breeding and feeding cycles. The fibers of the bedding can also trap flea eggs and larval stages, allowing for a continuation of their life cycle in a protected space.

In contrast, while wooden floors and areas around sinks can harbor various pests, they do not provide the same conducive environment for fleas that bedding does. Additionally, while fleas may occasionally be found near water sources due to the presence of pets or wildlife, it is not a primary habitat. Therefore, the nets of beds and animals stand out as the most common and favorable location for fleas.