What type of vegetation is found in Central Africa past the Gabon River?

The correct choice is tropical rainforest. Central Africa, particularly in areas west of the Gabon River, is characterized by tropical rainforest vegetation. This region experiences a humid tropical climate with high rainfall, which supports dense vegetation, including towering trees, rich biodiversity, and a complex ecosystem. Tropical rainforests, which thrive in regions close to the equator, are known for their high levels of humidity and unique flora and fauna.

The presence of tropical rainforest vegetation is a significant aspect of Central Africa's ecology, offering insights into the climatic conditions and geographic features that prevail in the area. In contrast to grasslands or savannas, which have more seasonal rainfall and are often dominated by grasses and occasional trees, tropical rainforests are lush and dense, exhibiting a wide diversity of plant species.