Final answer:
Argentina is the largest Spanish-speaking country in Latin America and is known for cultural elements such as the tango and gauchos. It is also an urban country with significant potential for economic growth.
Step-by-step explanation:
The largest Spanish-speaking country of Latin America, known for the tango and gauchos, is Argentina. Argentina is second only in physical size in South America to Brazil, but Brazil's primary language is Portuguese. The rich cultural heritage of Argentina includes a significant influence from Old World European customs mixed with New World Latin American traditions, which is vividly experienced in the metropolitan city of Buenos Aires.
Argentina is not only the second-largest country in South America in terms of physical area but is also home to Mount Aconcagua, which is the highest mountain in the Western Hemisphere.
The population distribution is heavily urban, with more than 90 percent living in cities. The country also has a potential for economic growth, which underscores its importance in Latin American affairs.