Shawna is a carrier of the gene for sickle-cell anemia. although she and her family have lived in america for generations, the gene most likely to protect her ancestors in from dying of malaria.

The answer is Africa. The second largest most populous continent is Africa. Earth’s total surface area 6% and the total land area is 20.4%. 1.2 billion As of 2016. It surrounded the continent by the Mediterranean Sea to the north both the red sea along the Sinai Peninsula to the northeast and Suez Canal, the Indian Ocean to the southeast and the Atlantic Ocean to the west.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion