What is the Congo River famously known as?

The Congo River is famously known as "the heart of Africa." This designation reflects not only its geographical significance but also its central role in the cultural and historical context of the African continent. The Congo River is one of the longest rivers in the world and flows through a significant portion of Central Africa, serving as a vital artery for transportation, commerce, and communication for the countries it traverses, such as the Democratic Republic of the Congo and the Republic of the Congo.

By referring to it as the "heart of Africa," this term also encapsulates the biodiversity and richness of the ecosystems along its banks, which are vital for numerous communities and wildlife. Thus, the phrase emphasizes both the physical and symbolic importance of the river within the broader narrative of Africa.

The other choices may evoke significant imagery or associations with Africa, but they lack the specific cultural and geographical resonance of the term "heart of Africa" as it relates to the Congo River's essential characteristics and its impact on the continent.