Where is the moving electric field that causes Earth's magnetic field? A.)earth surface B.)in space C.)earth mantel D.)earth core

D) core

Explanation:

The magnetic field is caused by the electric currents that occur in the core. The core is basically a hodgepodge of metals and really hot materials. Some of the metals, including iron and nickel, cycle around in the core in a process called convection. These convection currents lead to the electric currents and from there the magnetic currents.

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