Pet breeds refer to the specific categories of domesticated animals that have been selectively bred for certain traits, such as appearance, behavior, and size. Common examples include dogs, cats, and rabbits. Each breed has unique characteristics that can make them more suitable for different lifestyles and environments. For instance, Golden Retrievers are known for their friendly nature and are often chosen as family pets, while Siamese cats are recognized for their vocal and social behavior. Understanding pet breeds helps potential owners select the right animal that fits their needs and preferences.