Answer:
abrasion
Step-by-step explanation:
Abrasion is the grinding away of rock by friction and impact during transportation. Rocks are broken down into smaller particles by the mechanism of weathering. There after erosion causes the transportation of these rock particles.The rocks particles began to mechanically scrape themselves due to friction . This process of rocks scraping themselves to causing wearing on the surface is known as Abrasion. The rock particles might be transported by wind, glacier, waves and erosion.
Due to abrasion the rock particles might further disintegrate into more smaller particles.