Why is the Amazon the deepest river in the world?

It flows almost exactly along the equator, and the summer rainy season, usual for these places, alternately occurs in the northern hemisphere (in March-September), on its left tributaries, then in the southern (from October to April) – on the right tributaries, the Great River lives in fact, in conditions of constant flood. Because more than 15,000 rivers of different sizes flow into it. And the entire Amazon basin exceeds 7 million square meters. km.