The Amazon Basin is classified as a river basin, making it a vital geographical feature. The basin spans several countries in South America, primarily Brazil, and encompasses the world's largest tropical rainforest, the Amazônia. It plays a critical role in global climate regulation, biodiversity conservation, and indigenous cultures. The Amazon River, one of its defining characteristics, supports extensive waterways, ecosystems, and wildlife, and issues surrounding deforestation in the region are a significant global concern.