What is large natural streams of water usually leading to the ocean?

Large natural streams of water that usually lead to the ocean are called rivers. Rivers flow from higher elevations, such as mountains or hills, and travel across various landscapes before emptying into seas or oceans. They play a crucial role in ecosystems, providing habitats for wildlife and serving as vital resources for human activities like agriculture and transportation. Examples include the Amazon River, the Nile, and the Mississippi River.