The largest country by area in South America is Brazil. Covering approximately 8.5 million square kilometers, Brazil spans more than half of the continent and shares borders with every South American country except Chile and Ecuador. Its vast terrain includes the Amazon rainforest, extensive river systems, mountainous regions, and a diverse array of ecosystems. This immense area contributes to Brazil's rich biodiversity and cultural diversity, making it a significant player in both regional and global contexts. Brazil's size influences its economy, natural resources, and social dynamics, shaping the lives of its inhabitants.