Madeira river is in the South America, an important tributary of Amazon.
Ohio River
Because a tributary flows into a river. If a tributary flowed directly into the sea - it would be a river - not a tributary !
a tributary is a stream
It is called a tributary
A tributary.
The Missouri River and the Ohio River are both important rivers that empty into the Mississippi.
A Tributary
Certificate of Tributary Information
A tributary is water.
neasho tributary
The term is tributary. It means that it contributes to the bigger stream.