I'm sure its coercive.
Hope this helps :)
The Nile River, the longest river in the world, was considered the source of life in ancient time, as well as today in Egypt. Because of the Nile, people could live near there which was bordered by deserts on the east, south, and west, along with the Mediterranea Sea on the north. The Nile floods were predictable every year. The flooding started in July following the rain season in central Africa. The Nile provided valuable moisture and silt, which was deposited on the fields as the waters reached. These were favorable for farming. The Egyptians also depended on the Nile as their main transportation route. Therefore, many cities developed along the river owing to its importance of farming and transportation
San bernardino county, california is the largest county in america
http://www.beaconlearningcenter.com/documents/5215_4498.pdf
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