Four factors are necessary to sustain human life. Without a facility other four factors, this man can not be without. Because of the lack of substantial change in the lifestyle factor consists of the following four factors Housing Main article: man cave house and absolutely necessary to have housing. To protect the body from rain, wind or beast that will do harm to the man himself. Therefore, man must live in the right area to sustain human life in the early days. Popular live in caves or crevices in. The wind and rain Including lightning, thunder, lightning, too. Because humans historically have not understood the logic applied science or agriculture. The building houses unknown (Age man after a popular home for use as housing, clean and comfortable than the caves. And often a river, for ease of cultivation) or crop. Just hunting and vegetable food for survival only. But during the latter beginning to understand the main human science. Jack Funk weather And begin to understand the ecology Agriculture and Livestock He began to grow as a permanent home. Hunting of wild or stray quit. Then came the cultivation of various crops. To begin to recognize the benefits of the river. And build a house near a source of water for cultivation and eat humans today do not build a house next to the river for agriculture anymore. I used to live in the family. Is the occupation or recreation. And is currently building a home or dwelling place. For the same purposes as in the past, it was rare. And virtually no presence in the city or county's population density.
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