Freshwater rivers are bodies of flowing water that contain low concentrations of salt. They originate from sources like melting snow, rainfall, or springs and travel towards larger bodies of water, such as lakes or oceans. Rivers play a crucial role in the ecosystem, providing habitats for various plants and animals. These rivers are vital for human activities, supplying drinking water, irrigation for agriculture, and opportunities for recreation. They also support industries like fishing and tourism. Notable examples of freshwater rivers include the Amazon River, Mississippi River, and Nile River, each contributing significantly to their surrounding environments and communities.