Which landform is dominant in Central Africa and Saudi Arabia, as per the context provided?

The dominant landform in both Central Africa and Saudi Arabia is deserts. This is particularly evident in Saudi Arabia, which is home to regions like the Rub' al Khali, or the Empty Quarter, one of the largest sand deserts in the world. Central Africa features areas such as the Sahara Desert, which extends into some parts of Central Africa, and also includes semi-arid regions that exhibit desert-like characteristics.

Deserts are characterized by their arid climate, limited vegetation, and specific ecosystems that have adapted to very low rainfall. While Central Africa does include tropical rainforests and savannas, the significant deserts in its northern regions influence its overall geography, making deserts a defining feature of the central and northern landscape. In Saudi Arabia, the extensive desert terrain shapes its environmental conditions and human activities, including nomadic lifestyles and the location of urban centers.