Here's why:

* Gentle slope: Meandering rivers form on relatively flat land with a low gradient. This allows the river to move slowly and change course over time.

* Spreads out slowly: The slow flow of water causes the river to erode its banks gradually, creating wide, sweeping curves known as meanders.

* Wears away the valley: Over time, the erosion caused by the meandering river widens and deepens the valley, creating a characteristic, undulating landscape.

Here are some key features of meandering rivers:

* Oxbow lakes: As meanders become more pronounced, they can eventually loop back on themselves, cutting off a portion of the river and creating a crescent-shaped oxbow lake.

* Floodplains: The wide, flat areas along the sides of the river are called floodplains. These areas are prone to flooding during periods of high water flow.

* Point bars: These are deposits of sediment on the inside of the river bends, where the flow is slower and the river drops sediment.

* Cut banks: The outer banks of the meanders are called cut banks. These areas are subject to erosion as the river cuts into the bank.

Let me know if you'd like to know more about meandering rivers!