Question

Give a geographical reason for the following: Transportation is the major work of the river in the middle course​

Answer 1

Answer:

This is due to the fact that many more tributaries have joined the main channel, leading to an increased volume of water 

Answer 2

Answer:

The river starts to flow through a broad, level plain with heavy debris brought down from upper and middle courses. ... The work of the river is mainly deposition, building up its bed and forming an extensive flood plain. Landforms like braided channels, floodplains, levees, meanders, oxbow lakes, deltas etc.