Before revision: The Amazon River (dark blue) and the rivers which flow into it (medium blue) A river is a natural flowing freshwater stream , flowing on land or inside caves towards another body of water at a lower elevation, such as an ocean, lake, or another river.
After revision: The Amazon River (dark blue) and the rivers which flow into it (medium blue) A river is a natural freshwater stream that flows on land or inside caves towards another body of water at a lower elevation, such as an ocean, lake, or another river.