Who is defined as the owner of a dog?

The definition of a dog owner emphasizes the individual's relationship with the animal in terms of custody and control. The correct response highlights that the owner is the person who owns the dog or has custody of it, which encompasses both legal ownership and situations where someone might look after or manage the dog's welfare. This is crucial in legal contexts, as ownership often involves responsibilities such as ensuring the dog's health, safety, and obedience to local laws, including leash laws and vaccination requirements.

The other options focus on specific activities related to dogs, such as breeding, selling, or raising them for companionship. While these roles may involve a level of responsibility or connection to dogs, they do not adequately define ownership as it pertains to legal and welfare responsibilities. The essence of ownership lies in the responsibility for the dog's well-being and the authority over it, rather than merely breeding or selling dogs.