Somalia is located on the Horn of Africa, a strategic position in the Red Sea and the Gulf of Aden. ... Somalia was known to the Egyptians as the Land of Punt. Punt was famous for frankincense and myrrh. The Chinese traded with Somalia in the tenth century.
Soil erosion removes the top soil that is the most valuable part of the soil for agricultural purposes. With this loss of important soil, there is lower yield but higher cost of cultivation.
Soil erosion will work its way downstream that will find its way into the water systems of cities. The top soil may contain pesticides and fertilizers. The soil will also find its way into streams and rivers where it could possibly clog up the natural channels of waterflow.
The industrialization of the late nineteenth century brought on rapid urbanization. The increasing factory businesses created many job opportunities in cities, and people began to flock from rural, farm areas, to large urban locations. Minorities and immigrants added to these numbers.
I believe C is the correct answer; parent material is rich in nutrients for plants, and decomposed plant litter is also known as decaying organic material. Hope this helps! :)