formed along the downriver side of the
Piedmont and were used for manufacturing power,


Answer :

The Waterfalls is the natural features that formed along the downriver side of the  Piedmont and is been used for manufacturing power.

What is a Waterfalls?

A waterfall refers to a point in a river or stream where the water flows over a vertical drop.

A waterfall can be used for recreational activities or generation of hydro-electricity energy.

Hence, the natural features that formed along the downriver side of the  Piedmont and is been used for manufacturing power is a waterfalls.

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