Which natural resource is important to the desert region and mountain region?

Minerals are the important natural resource.
In desert regions or arid lands, it can be found rich mineral deposits as result of high evaporation. When there are lakes or water formations due to eventual water deposition, they lead to high concentrate mineral sources of minerals such as gypsum, borates, and salts.
In mountain regions, there can be often found minerals, and mining is often present. 

When two tectonic plates collide and one or both push upwards they also push up the crust,a mountain will for so that will be your answer. hoped this