Where is the brown dog tick not considered a problem?

The brown dog tick is a species commonly associated with domestic environments and animals, particularly dogs. While these ticks can indeed be found inside homes, they are considered particularly adapted to living and breeding in sheltered, indoor environments where they can remain close to their hosts.

However, the correct choice reflects that indoors is where one might not consider them a significant problem when compared to the other listed environments. This is mainly because, despite their ability to thrive indoors, outdoor environments, gardens, and pets present a higher risk for infestation and transmission of diseases. Outdoors and in gardens, the brown dog tick encounters more potential hosts, allowing for greater population expansion compared to indoor scenarios. Additionally, when on pets, these ticks can easily get transmitted and create a more problematic situation for pets and their owners.

Therefore, within the context of the overall assessment of where the brown dog tick poses significant challenges to both pets and humans, indoors is viewed as a less problematic setting.