Here's why:

* Erosion is the process of wearing away and transporting rock, soil, and other materials.

* Splits are formed when water, wind, or ice carve out narrow channels or gaps in the land.

For example:

* River splits are formed by the erosive power of flowing water.

* Glacial splits are formed by the movement of ice sheets, which scrape away rock and create valleys.

* Coastal splits can be formed by wave erosion.

Deposition, on the other hand, is the process of adding sediment to a landform. While deposition plays a role in shaping landscapes, it is not the primary force behind the formation of splits.