#give two pieces of evidence from the upper course of the river?

1. Steep gradient: The upper course of a river typically has a steep gradient, which results in fast-flowing water and the erosion of the riverbed and banks.

2. V-shaped valleys: The upper course of a river often features V-shaped valleys, which are formed through the process of erosion as the river cuts down into the landscape.

1. Increased velocity: The upper course of a river has a steeper gradient, which results in a faster flow rate.
2. Erosion: The high velocity of the water in the upper course leads to increased erosion of the riverbed and banks, creating V-shaped valleys and rapids.