Answer:
The Industrial Revolution brought rapid urbanization, or the movement of people to cities. Changes in farming, soaring population growth, and an ever-increasing demand for workers led masses of people to migrate from farms to cities. Almost overnight, small towns around coal or iron mines mushroomed into cities.
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<span>The economic civil war between eastern and western Ukraine is not a reason for the ongoing crisis, because said economic civil war doesn't really exist. Any economic conflicts existing are by and large between Ukraine and Russia, involving gas pipeline disputes. Meanwhile, the other choices all led to or built up to the current crisis. The surrender of nuclear weapons mandated by the Budapest memorandum led to the closer Ukraine-West ties that have Russia initiating its annexation to consolidate power and fulfill it's geopolitical ambitions, and the election and subsequent deposition of Viktor Yanukovych exacerbated the instability in the political environment, and furthered the divisions between the different regional and cultural areas, some of which have significant portions of Russian-sympathizing citizens.</span>
Physical factors that affect population distribution include altitude and latitude, relief, climate, soils, vegetation, water and location of mineral and energy resources.
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Russia had no secure border. Following <span>the devastation faced by Soviet Union in WWII, they wanted to push the border away from Kiev, from Moscow & Minsk
</span><span>The Yalta Agreement between FDR, Churchill & Stalin had laid out the spheres of influence that each of the Allied countries would have, and the satellite countries all fell under the Soviet sphere. </span>
