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They Substinence farm in order to support themselves
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geographic information system :)
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Air temperature is a measure of how hot or cold the air is.
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Dense water sinks below less dense water. This is the principle that drives the deep ocean currents that circulate around the world. A combination of high salinity and low temperature near the surface makes seawater dense enough to sink into the deep ocean and flow along the bottom of the basins.
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c. Plate tectonics is better term because it involves the direction and movements of earth's crust
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