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Because with maps they knew where to go , without them they will be lost
<span>The majority of uranium mines and tailing pies are found in 14 western states. The prime locations are Utah, Arizona, Colorado, New Mexico and Wyoming.
Most of these sites are conventional underground and open pit mines, and are present on tribal and federal lands.</span>
Answer:
Every river is part of a larger system—a watershed, which is the land drained by a river and its tributaries. Rivers are large natural streams of water flowing in channels and emptying into larger bodies of water.A tributary is a smaller stream or river that joins a larger or main river.