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The dog (Canis familiaris or single Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the house-broken dog, it was domesticated from an antiquated citizenry of wolves during the Unpunctual Pleistocene, late upward of 14,000 years ago sooner than hunter-gatherers, prior sit to the maturity of agriculture. The dog was the first species to be domesticated on humans. Experts assess that due to their big combine with humans, dogs have expanded to a weighty calculate of domesticated individuals and gained the cleverness to develop on a starch-rich regime that would be incapable of for other canids.[4]

The dog has been selectively bred over millennia seeing that different behaviors, sensory capabilities, and corporeal attributes.[5] Dog breeds remodel largely in condition, immensity, and specific color. They put on myriad roles in compensation humans, such as hunting, herding, pulling loads, keeping, assisting police and the military, amity, therapy, and aiding disabled people. Ended the millennia, dogs became uniquely adapted to benevolent behavior, and the sensitive–canine fetters has been a text of frequent study. This pressure on benevolent the public has postulated them the sobriquet of "people's most beneficent friend".