Over the past several million years, these peaks have been gradually worn down. if not for the process of carrying small bits of sediment away, the peaks above might be 1,000 meters taller.
1.physical weathering
2.deposition
3.chemical weathering
4.erosion

4.erosion

Explanation:

The erosion is the process of removal and transportation of the surface and sub- surface materials from their site of origin to other place. The erosion can occur by physical factors such as water and wind. The erosion is also capable of destroying the naturally formed and man made structures.

According to the given situation, the erosion is likely to remove the sediments away. It was capable of eroding the surface unless the height of the peak could be 1000 meters taller.

chordata is the answer