What part of the dog's body is typically affected by infestations of biting and sucking lice?

Infestations of biting and sucking lice primarily affect the ears, neck, shoulders, and groin areas of a dog. These regions are typically where grooming may be less thorough and where the skin is more accessible. Lice prefer areas with thinner hair or where the coat is less dense, making it easier for them to attach to the skin and feed.

In contrast, the other body parts mentioned in the options—such as the tail and paws, face and belly, or nostrils and eyes—are less commonly targeted by lice. The tail and paws may not provide an ideal habitat due to the density of fur or the nature of how lice cling. Similarly, lice do not typically infest sensitive areas like the nostrils and eyes, which are less conducive to their life cycle due to the potential for grooming and irritation. Thus, the correct choice accurately reflects the typical locations where lice infestations occur in dogs.