The phases of the moon are caused by
a) the moon revolving around the sun and earth.
b) earth revolving around the sun and the sun's light being reflect off the moon.
c) the moon revolving around earth and the moon reflecting sunlight towards earth.
d) the moon revolving around earth with sunlight reflecting off of earth towards the moon.

The lunar phases are produced as a result of the change of the relative positions of the Earth, the Moon and the Sun.

The part of the lunar surface illuminated by the Sun that we can see from the Earth, is changing throughout a cycle that is repeated periodically every 29 days, 12 hours, 43 minutes and 12 seconds.

The answer is: B) Earth that revolving around the sun and the sun's light being reflected off the moon.

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

a- all cells come from pre-existing cells