The river channels in the lower course is wider than the upper course.
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it is because its speed decrease in the plains and it forms deltas
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Answer:
The river channels in the lower course are wider than the upper course because at the upper course the speed is high and it starts to cut anything in its path and at the lower course, the speed is low so it starts to distribute in many directions and distribute useful sediments.
Explanation:
In the 'lower course', the river channel becomes deeper and wider. The velocity is often greater than the upper curse because the channel is highly efficient with low friction. The channel is almost semi-circular and much smoother because of 'deposits of sand' and mud. 'In the lower course', a river flows through wide, flat valley called flood plain.
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