The largest river system of the world is ………….

1. Amazon
2. Orinoco
3. Paraguay
4. Parana

Brazilian highland is the source of which river basin

1. Paraguay
2. Amazon
3. Orinoco
4. Araguaia

Which desert lies to the south of Pampas?

1. La Tatacoa
2. Patagonia
3. Atacama
4. La Guajira

The …………… highland is the home for the world's highest waterfall.

1. Guiana
2. Brazilian
3. Patagonian
4. Andes