The continent that contains the majority of Earth's rainforests is South America, primarily within the Amazon Basin. The Amazon rainforest is the largest tropical rainforest in the world, hosting an unparalleled diversity of flora and fauna. This vital ecosystem plays a crucial role in regulating global climate, storing carbon, and providing oxygen. South America's rainforests are essential for biodiversity conservation and indigenous cultures, making their protection a priority in the face of threats such as deforestation and climate change.