If you are meaning why are there hills, mountains, and valleys, then the answer to your question is: wind and water.
The sun heats water, and it evaporates into the atmosphere. This water then falls back to the ground in the form of rain. When it rains at any elevation above sea level, the water then flows from high elevation down to sea level. The water then groups together and forms rivers which cut the ground and wash loose dirt down the river along with it.
In areas where there is no water( the desert) the wind is the primary erosion factor. The wind picks up small particles of sand and hurls it through the air and smacks it into rock, which breaks off minuscule particles.
These two factors are the main causes of erosion, which in turn is what causes topography.
the detailed mapping or charting of the features of a relatively small area , district , or loclity
Rushing water is usually controlled by pressure and topography of the land.
There's no such thing as a topography.
The topography of the ocean floor
A selection of articles related to River Topography
The plural of topography is topographies. As in "these topographies are interesting".
land has topography... not sharks
It is called a karst topography.
(Topography deals with the physical features of a geographic area.)"The topography of the region suggests ancient volcanic activity.""The map of Middle Earth's mountains is excellent fictional topography.""We spent the morning discussing the topography of England's Thames valley."
no you want "topography" http://en.wikipedia.org/wiki/Topography
Topography contributes to soil through Pokemon.