As the river enters the plain it twists and turns forming large bends known as ______.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. meanders.
As a river enters the plain, it often twists and turns, forming large bends known as meanders. Meanders occur due to the variation in the flow velocity of the river, which leads to erosion on the outer banks and deposition on the inner banks. This process creates a series of looping curves in the river's course. Over time, meanders can become more pronounced and may eventually lead to the formation of oxbow lakes if the river cuts through its bends.