Which of the following traits is common to brown dog ticks?

The brown dog tick, scientifically known as Rhipicephalus sanguineus, is particularly known for its strong association with dogs as its primary host. This tick is adapted to live in close quarters with domestic dogs, often found in their homes or kennels. Its lifecycle is heavily influenced by the presence of dogs, as these ticks not only feed on them but are also capable of reproducing on them.

These ticks have a unique ability to thrive in indoor environments, particularly where dogs reside, unlike many other tick species that prefer outdoor habitats or are more generalist in their host preference. The adaptations of brown dog ticks to exploit this close relationship with their canine hosts contribute to their success and prevalence in areas where dogs are present. This is why the characteristic outlined in the correct answer emphasizes their almost exclusive reliance on dogs for both feeding and reproduction.