Water: it can wash things out. depending on the strength it can reform islands or other things. Wind: it can blow around fine particles of the earth, overtime it creates a new shape to the land. Sand: when blown in a desert the sand mounds will change shape, however it can erode rocks too, its a slow process though. Fire: it obviously burns things down. when burning trees fall if they don't burn completely they will remain. over time new plant life will grow over the tree forming a new shape.
