Answer :
The Mississippi River System, also referred to as the Western Rivers, is a mostly riverine network of the United States which includes the Mississippi River and connecting waterways. The Mississippi River is the largest drainage basin in the United States.In the United States, the Mississippi drains about fifty-nine percent of the country's rivers.
Sample Answer:
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The Mississippi River is the second longest river in the United States, running over 2,350 miles from the northern part of the country to the Gulf of Mexico. One of its most important functions is to drain all of the land between the Rocky Mountains and the Appalachian Mountains. It does this as the base of many connecting tributaries; other waterways connect to the Mississippi River and help drain the entire region. The Mississippi River also is crucial for commercial trade across the region. Ships can travel up and down the river, allowing for more foreign and domestic trade to be conducted in the interior region of the United States.