Final answer:
The Pampas, deriving their name from a Quechua Indian word, are the Prairies of South America, known for being a fertile agricultural region in Argentina, Uruguay, and Brazil.
Step-by-step explanation:
The Prairies of South America, known for their vast, fertile plains, are often referred to as the Pampas. This name stems from a Quechua Indian word and describes the grasslands that are predominantly located in Argentina, but also spread into Uruguay and the southern tip of Brazil. With its rich soils and favorable climate, the Pampas region is an agricultural powerhouse, facilitating activities such as farming, cattle ranching, and livestock production. This region is vital to the Southern Cone's economy, hosting Buenos Aires, the largest city and capital of Argentina, and accounting for a substantial portion of the country's population and agricultural output. The Pampas, with its adequate precipitation and type C climate, is well-suited for human habitation, making it one of the most productive agricultural regions in the world.