Explain how a waterfall is formed ? ?

A waterfall is formed when a river flows over a steep drop in elevation, causing the water to plunge downwards. This drop in elevation can be caused by a variety of geological processes, such as erosion, tectonic activity, or changes in the landscape.

One common way that waterfalls are formed is through the process of erosion. Over time, flowing water can wear away the rock and soil beneath it, creating a steep drop in elevation. As the water continues to flow over this drop, it creates a waterfall.

Another way that waterfalls can be formed is through tectonic activity, such as the shifting of tectonic plates or the formation of faults. These processes can create sudden changes in elevation in the landscape, leading to the formation of waterfalls.

In some cases, waterfalls can also be formed by changes in the landscape, such as the melting of glaciers or the movement of sediment. These changes can create sudden drops in elevation that cause water to cascade downwards, forming a waterfall.

Overall, waterfalls are formed when a river encounters a steep drop in elevation, causing the water to flow downwards in a dramatic and picturesque manner.