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When small rivers meet with big rivers, what are they called?
1. Delta
2. Canals
3. Tributaries
4. Waterfall

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Correct Answer - Option 3 : Tributaries

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. 
  • A tributary or affluent is a stream or river that flows into a larger stream or main stem river or a lake.
  • A tributary does not flow directly into a sea or ocean.
  • Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean.

  • Delta
    • It is a depositional feature of a river formed at the mouth of the river.
    • These are wetlands that form as rivers empty their water and sediment into another body of water, such as an ocean, lake, or another river.
    • It is a characteristic feature of a river in its senile stage (old). 
  • Canal 
    • It is a manmade waterway that allows boats and ships to pass from one body of water to another.
  • Waterfall
    • It is an area where water flows over a vertical drop or a series of steep drops in the course of a stream or river.
    • Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf.

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