Water.
Because of gravity.
This process is called erosion. Erosion is the process of eroding or being eroded by wind, water, or other natural agents
The dominant process is erosion (generally a destructive process). Events that increase the elevation of land surfaces are either very slow (orogeny) or sporadic (volcanoes, earthquakes).
Positive shapes
All kinds of shapes - usual and unusual.
Erosion and deposition shapes the Earth's surface.
minerals
landforms
Erosion by weathering.
Erosion and weathering
Because of gravity.
Rain changes the earths surface by breaking down limestone to form different shapes.
Erosion
Erosion.
oaval
It's the tectonic plates pushing against each other, forcing the land upwards.
Erosion.