Which river, named after a tribe of female warriors, drains the largest equatorial region on earth?

The Amazon River is named after the legendary tribe of female warriors, known as the Amazons, from Greek mythology. This river is renowned for draining the largest equatorial region on Earth, covering a vast area that includes several countries in South America, predominantly Brazil. The Amazon Basin is the largest tropical rainforest and contains a significant portion of the world's biodiversity, making it a vital ecological zone.

The vast drainage area of the Amazon River is significant in geological and hydrological terms, as it plays a critical role in regulating the climate and providing habitat for countless species of wildlife. Its watershed also supports millions of people and connects various ecosystems. This extensive drainage is unmatched by other rivers, making the Amazon the correct answer in this context.