Families specialize in thei tasks by piding the wok among the diffeent membes accoding to what they ae best qualified to do. Fo example, mothes cook, childen wash dishes and make beds, fathes mow the gass and paint the house. By doing the same thing again and again, and by close coopeation, a family is able to wok faste and get moe wok done than if just one do many kinds of tasks. Similaly, it is 'coopeation' that make ou complicated moden society wok.
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