A source of a river is where it starts. A source can be melting glacial ice, marshes or a water spring.
Answer!-Usually the start of a river is called its source and the end of the river is called the mouth.
The source of a river is where the river starts.
go to a river and find out look at a picture of a river i don't know don't ask me
like a normal river really filled with water
like the mouth of a river
A source is the beginning of a river or water way and a mouth is the end of that river or body of water!
The source or beginning of a river is called the 'headwater'. The beginning of a river is known as the source.
a delta
The place where the river begins is called a source.
the river yellow source is china
the sun
The source is where a river begins. The end of a river is usually at the sea.