The fourth factor is what is essential to human life. Without the aid of another factor. facilities, the four men could not be missing. When worn out, because it may affect your life.The fourth factor consists of the following four factors:Housing.See main article: the cave and the House man needed to require housing. To protect the body from rain, wind, or any beast to perform harmful to humans themselves. Therefore, human beings must live in an area that is suitable to the human life in the early popular live in caves or on cliffs to trok. wind and rain as well as lightning cable. Lightning Thunder as well, because human reason cannot understand the principle in the past, the TA therefore unknown to science or agricultural building (human era after the popular houses to create a clean and comfortable living over the river and create a cave so lovely.Rapho plant) or plants just hunting and vegetable food only for life. But during the era of human Herpes Simplex will understand in the pharmaceutical sciences, Willoughby quit fear weather and began to understand ecosystem. Agriculture and livestock, thus starting the turn to build a House as a permanent address. Quit strange hunting or domestication of wild, instead Including start well known benefits of the river and build a house near the water to bathe, eat and planting a human present does not build a house next to the river for agriculture anymore. But it used to be that a family living in a profession or for recreation, and is currently building or housing for the same purpose in the past, the rare and almost never appear in the town or County population density!
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