Broad curves in a river where erosion is more prominent are known as meanders.

Here's why:

* Erosion and Deposition: Meanders form due to the natural process of erosion and deposition. The faster-moving water on the outside of a bend erodes the bank, while the slower-moving water on the inside deposits sediment, creating a gradual curve.

* Continuous Change: Meanders are constantly evolving. The erosion process widens the curves, and eventually, the river may cut off a meander, creating an oxbow lake.

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