Question

How the 'V'Shaped valley is formed?​

Answer 1

Rivers begin high up in the mountains so they flow quickly downhill eroding the landscape vertically. The river cuts a deep notch down into the landscape using hydraulic action, when the sheer force of the water gets into small cracks and breaks down the sides of the river valley.

Answer 2

Rivers begin high up in the mountains so they flow quickly downhill eroding the landscape vertically. ... As the river erodes downwards the sides of the valley are exposed to freeze-thaw weathering which loosens the rocks (some of which will fall into the river) and steepens the valley sides.