In North Africa the vast majority of the Sahara Desert is made up of?

In North Africa, the vast majority of the Sahara Desert is made up of sand dunes, gravel plains, and rocky plateaus. The desert features large expanses of shifting sand dunes, particularly in regions like the Erg Chebbi in Morocco. Additionally, the Sahara is characterized by its harsh climate, with extreme temperatures and minimal rainfall, contributing to its arid landscape. Despite its inhospitable conditions, the desert is home to various unique flora and fauna adapted to survive in such an environment.