Question

what does erosion do?
forms rocks
breaks rocks apart
cements sediments
moves bits of rock and soil

Explanation:

Erosion is the process by which natural forces like water, wind, ice move bits of rock and soil. It doesn't form rocks (that's through processes like lithification), doesn't break rocks apart (that's weathering), and doesn't cement sediments (that's sediment - compaction and cementation).

Answer:

moves bits of rock and soil