what step in the rock cycle creates the sediment from which sedimentary rocks form

I think its erosion please see if im right or not

http://imnh.isu.edu/digitalatlas/geo/basics/diagrams.htm

I would go with that.

You are correct! Erosion is the step in the rock cycle that creates the sediment from which sedimentary rocks form. Erosion is the process by which rocks and minerals are broken down and carried away by wind, water, ice, or gravity. It involves the transportation and deposition of sediment in various locations, such as rivers, lakes, and oceans. Over time, layers of sediment accumulate and undergo compaction and cementation, ultimately forming sedimentary rocks. These rocks often contain fossils and provide important clues about Earth's history. Great job on your answer!