The answer is: "notch" .
____________________________________________
Option D is the correct answer
All of the above
A river slope, volume of flow and shape of its streambed affects the load that a river carries. When a river has a steep slope, its velocity increases and with the increasing velocity rivers load carrying capacity increases. The volume of flow is the amount of water flowing in the river. Thus the larger the volume of flow, the higher is the speed of the river and the higher the speed the larger is the sediment quantity in the flow volume
In a streamlined channel of river, the factor of friction reduces. These friction factors usually reduce the speed of the flow. Now since, the factors are reduced, rivers’ speed increases and thus the quantum of load also increase.
