Question

give me the reason the river Swift at their sources and slow down in their middle and all courses give me in short give me the reason the river are Swift at their sources and slow down in the middle and old courses give me the answer in short

Answer 1

At the source of the river the land are usually mountainous nd the slope are steep thus high speed of flow. On the other hand the land are usually plain at the middle and mouth of the river thus rivel flowing slow