Even that is insufficiently precise. Death is not the only thing that separates children from parents. Neglect, disinterest, self-involvement, inability to pro

Even that is insufficiently precise. Death is not the only thing that separates children from parents. Neglect, disinterest, self-involvement, inability to provide, etc. And beyond a certain minimum viability, no adult is strictly required. Street "urchins" take care of themselves and each other.