Question

2. These are elevated rock-covered plateaus found
in the Sahara, from which the sand has been
blown away:​

Answer 1

Explanation:

In the depressions (which are formed when the wind blows away the sands) where underground water reaches the surface; oasis is formed. These areas are fertile. People may settle around these water bodies. People may grow date palms and other crops. Sometimes the oasis may be abnormally large.