Why does the amount of water that flows in a river change during the year

All river water comes from melted ice from mountains near them, so the time of year to temp. change depicts how much ice is melted into the river banks.

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.

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