Which river forms part of the international border between Argentina and Paraguay in the northern Gran Chaco?
Answer and explanation
Correct answer: C. The Pilcomayo River
- Step 1: The Pilcomayo originates in Bolivia and forms the border between Formosa province and Paraguay. Step 2. It splits into multiple channels and marshlands (Bañado La Estrella). Answer: The Pilcomayo River. Why not the others: It carries heavy silt loads and exhibits extreme seasonal flow fluctuations.
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