What is the name of the biggest river in South America?

The Amazon River is recognized as the biggest river in South America, and it holds the title of the largest river in the world by discharge volume of water. It stretches over 4,000 miles and flows through several countries, including Brazil, Peru, and Colombia. The Amazon Basin is also home to the largest rainforest in the world, which contributes to its vast scale and ecological diversity. Its immense length and the vast area it drains make it a significant geographical feature not only in South America but globally.

In contrast, the Orinoco River, while one of the major rivers in South America, does not match the Amazon in size or discharge capacity. The Nile, perhaps more commonly known as the longest river in the world, is located in Africa, while the Yangtze is the longest river in Asia. Hence, the dominance of the Amazon in South America's waterways firmly establishes it as the biggest river in the continent.