What are the 2 causes of desertification in the Sahara ?

water and sand

Explanation:

Population growth - the population in some desert areas is increasing. In places where there are developments in mining...

Removal of wood - in developing countries, people use wood for cooking. As the population in desert areas increases,...

Overgrazing - an increasing population results in larger desert areas being farmed.

Explanation:

answer; /// the answer to the first question is (b) it began when people first deliberately seeds; /// and (d); // it gave people a steady food supple for the first time;

you so !