Question

in which river course does a river perform lateral erosion ?

justify your answer with a reason ​

Answer 1

Answer:

Upper course to the lower course.

Explanation:

The rates of erosion, transportation and deposition change.

Answer 2

Answer:

long profile is a line representing the river from its source (where it starts) to its mouth (where it meets the sea). A river changes with increasing distance downstream from its source towards its mouth. It moves through its upper course, to its mid-course and finally into its lower course.

Steep valley sides are typical of a river's upper course in upland areas. The valley here has steep sides and the valley bottom is narrow. This is why valleys like this are called V-shaped valleys.