Which process moves small rock pieces during sedimentary rock formation?

compaction

deposition

erosion

weathering

The process that moves small rock pieces during the sedimentary rock formation is erosion.

The carrying away of small rock particles by the effect of wind, water or ice. It is a surface phenomenon on the earth's crust and then the transportation takes place.

This is a natural phenomenon caused by the dynamic activity of the agents that can cause erosion.