The Congo Basin refers to the second-largest rainforest in the world, primarily located in Central Africa, encompassing parts of several countries including the Democratic Republic of the Congo, Republic of the Congo, Gabon, and Cameroon. Cameroon, situated to the northwest of the Congo Basin, features a significant portion of its territory covered by dense tropical rainforest, contributing to the basin's rich biodiversity and ecological significance. Understanding the geographical distribution of the Congo Basin is crucial for UPSC Prelims as it ties into broader environmental, ecological, and socio-economic discussions relevant to regional development and conservation efforts in Africa.