is a form of culture handed down and developed. because the only people that know learn, repair and renovation tien.vi example, when the old man fish bones comb to comb the hair do, but now, they can do many types of combs in the other material and for many different types of hair. not like animals, they are not willing to learn. such as buffalo species in the desert. we are only moving in a certain route and know there are crocodiles in the water no matter what has to be passed to the other side, although there are many other children die in front.
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