1the present of raw material
2the need for markets.
3) the search for labour force.
Differences in water density, resulting from the variability of water temperature (thermo) and salinity (haline), also cause ocean currents. This process is known as thermohaline circulation. In cold regions, such as the North Atlantic Ocean, ocean water loses heat to the atmosphere and becomes cold and dense.
Weathering is described as a passive agent of landform development because it is not directly affecting it.
The one that directly affect the landform are wind, water movement, and tectonic activities. Weathering only affect the formation of these factors.
