Erosion is largely caused by Glaciers.
Answer:
Clouds are just lots of drops of water all stuck together. When clouds get so full of water droplets that they can't hold any more, the water falls back to the ground as rain! Sometimes the water droplets freeze and fall to the ground as snow, sleet, or hail. Water or ice that comes from clouds is called precipitation.
Ur answer is Economic Instability!
Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Several types of evidence supported Hess's theory of sea-floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves. This evidence led scientists to look again at Wegener's hypothesis of continental drift.