Rivers are important to people primarily because they serve as the driving forces of the water cycle that continuously provides the planet with a sustainable supply of freshwater, which is essential for the people's survival. These bodies of water also form the natural habitat for various organisms, often utilized by human beings as food sources.
Rivers are natural freshwater streams that cover the Earth's surface. These water bodies follow a downstream course, beginning at their "sources" and ending at their "mouths," often draining into the sea. Rivers also play an important role in navigation by providing trading routes. Some of the significant rivers in the world include the Nile, Amazon, Yangtze, Ganges, Thames and Mississippi rivers.