Old Man River
They are the source of a constant supply of water.
They protect the subcontinent from earthquakes.
They provide protection from enemies.
They are the location of roads used for trade.
Their waters are too polluted to be used for drinking.
Their waters carry sediment that is good for farming.
Their waters carry fish so large that one can feed an entire village.
Their waters are too cold for farming.
Geographers studied ancient maps.
Archaeologists discovered its ruins.
Historians read ancient scrolls.
Satellite pictures revealed cities along an ancient dried-up riverbed.
The Indus River Valley
The Western Ghats
The Ganges River Valley
In the Brahmaputra River valley.
In the Hindu Kush Mountains.
On the Deccan Plateau.
In the Eastern Ghats.
The Indian Ocean
The Hindu Kush
The Sahara Desert