Final answer:
The Pampas is the fertile plains region in Argentina known for its agriculture and cattle ranching, contributing significantly to the country's economy and facilitating major beef exports.
Step-by-step explanation:
The fertile plains region in Argentina that is noted for farming and ranching is known as the Pampas. This region encompasses a large portion of eastern Argentina, Uruguay, and the southernmost part of Brazil. The Pampas is characterized by its adequate precipitation, mild climate, and rich soils, making it well-suited for agricultural activities such as farming and cattle ranching.
The Pampas is considered the breadbasket of the Southern Cone due to its abundant agricultural production. Notable for hosting the largest city and the country's capital, Buenos Aires, it plays a significant role in Argentina's economy. The vast grasslands of the western Pampas are home to large haciendas that focus on cattle ranching and livestock production, elevating Argentina as a major exporter of beef around the world.