The initial stage on the rivers (mountains) The water flows raplidy . The rivers move the rocks with it
Lower course
The starting point of the rivers
Source
Upper course
It the final stage . The rivers flows slowly . It diposited the rock . It form curves called meanders
It the end .The water carried by the rivers flows into anther rivers (tributaste)
The mouth
The water flows more slowly .The landcapes is less seep
MIDDLE COURSE
