the Gran Chaco
The Gran Chaco (Chaco plains) extend from northern Argentina, through Paraguay, to southern Bolivia.
It is called the Gran Chaco and by some definitions extends into extreme SW Brazil.(The altiplano, a separate geographic area to the NW, is also called the Andean Plateau.)
PAMPAS
gran Chaco
pampas..
This is the Andean Plateau, also known as the Altiplano. It is located across western Bolivia, southern Peru and northern Chile and Argentina.
Second in South America only to Brazil in size and population, Argentina is a plain, rising from the Atlantic to the Chilean border and the towering Andes peaks. Aconcagua (22,834 ft, 6,960 m) is the highest peak in the world outside Asia. Argentina is also bordered by Bolivia and Paraguay on the north, and by Uruguay and Brazil on the east. The northern area is the swampy and partly wooded Gran Chaco, bordering Bolivia and Paraguay. South of that are the rolling, fertile Pampas, which are rich in agriculture and sheep- and cattle-grazing and support most of the population. Further south is Patagonia, a region of cool, arid steppes with some wooded and fertile sections.
Pampas - The word comes from a Quechua Indian word meaning "flat surface". Reference: Encyclopedia Britannica.
the Gran Chaco
The Pampas is the name of the flatland that covers much of central Argentina. It is known for its fertile soil, suitable for agriculture and cattle farming. The Pampas region is one of the main agricultural areas in Argentina.
the gran chaco is the large plain region in parauguay
they are alike by they are states and they have people in the states