INDIAN GEOGRAPHY

Detailed explanation-1: -A tributary is a freshwater stream that feeds into a larger stream or river. The larger, or parent, river is called the mainstem. The point where a tributary meets the mainstem is called the confluence.

Detailed explanation-2: -The Irtysh is a chief tributary of the Ob river and is also the longest tributary river in the world with a length of 4, 248 km (2, 640 mi). The Madeira River is the largest tributary river by volume in the world with an average discharge of 31, 200 m3/s (1.1 million cu ft/s).

Detailed explanation-3: -A river’s watershed includes the river, all its tributaries, and any groundwater resources in the area. The end of a river is its mouth. Here, the river empties into another body of water-a larger river, a lake, or the ocean. Many of the largest rivers empty into the ocean.

Detailed explanation-4: -: a river branch flowing away from the main stream.

Detailed explanation-5: -The correct answer is Tributaries. Tributaries are the meeting of two or more bodies of water. Hence option 3 is correct. It usually refers to the point where two streams flow together, merging into a single stream.