Question

A river in the upper parts of its course where it has great energy to erode is said to be in _____________

Answer 1

Rivers have three main stages:
1) Young or youthful river-- this is the part of the river in its upper course where it has more energy and forms a V-shaped valley in its bed. The river is characterized by waterfalls and have a small width that have is rapid and has a tumbling flow.

2)Middle age/mature river:
This is the part of the river in the middle course. The water flow here has slowed down and the river is broader than at its upper course. This part is characterized by meanders and ox-bow lakes.

3)Old age

This is the the final stage of the river where it empties into a water body. The water flow is very slow and the banks of the river are quite muddy or swampy. The part of the river is also characterized by deltas where it divides into many channels as it empties into the water body.