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Content: If there is fertile land, then crops can be grown. Animals can also be raised if there is enough food and water for them. People learned that they could stay in one place and grow enough food to feed their community, if they were near a water supply. Fertile: able to grow plants because of nearby water supply 
As time went on, waterways began to serve more purposes. Rivers, lakes, and seas began to be used for transportation. People built boats, and started exploring the area around them. People began to build their homes where they could be close to food and supplies. Larger towns and cities began to spring up along trade routes. Let's stop for a minute, and think about the locations of some of the major cities, here in the United States.