Artificial selection is basically selective breeding. Humans have impacted this because we choose which traits we want to have and breed out bad traits. For example, with dogs, we have tried to breed out aggression and anger. We want dogs to be playful and happy and in order to do this we have chosen a species to breed again and again to make something more favorable.
Because dogs are kept in home their environment is around children. Because of this people have strayed from wanting aggressive dogs, they may have once used them to guard their land or protect their property but are rarely used for that purpose anymore.
In the future we may need guard dogs or we may need some animals that are aggressive but we have attempted to end these traits. Dogs are seen as house pets and in the future I believe they still will be just house pets. They are playful because of the way we have bred them over time.
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