At the watershed, at top of the mountain or upland region\area.
The beginning of a river is usually located high in the mountains. It may be known as either the "source" or the "headwaters".
c. near the mouth of the river
High in the mountains
The source is where a river begins. The end of a river is usually at the sea.
not necessarily, but usually, yes.
At the mouth (opening/beginning) of a river.
Actually in a literal sense a spring is the beginning of a river, though usually a watershed feeds a river, and that is a collection of springs and run off paths gathering.
Usually snow melt from mountains at the beginning of the river.
The Elbe River is a major river in Europe. It is located in the Czech Republic and Germany.
Chinsha River, usually called Jinsha River, the headwaters of Yangtze River, located in the southwest of China.
The beginning of the river usually starts in mountainsided areas or in small lakes. It is also called a creek or stream.
Answer!-Usually the start of a river is called its source and the end of the river is called the mouth.