Answer:
I know you only need two, but here:
--Subsidence and sinkholes.
--Sinkholes and caverns.
--Waterfalls and rapids.
--Deltas and levees.
--Erosion and abrasion.
Explanation:
Sedimentary rock forms *over time,* which means that those rocks had to form over millions of years, proving that the Earth has been forming and changing all this time.
It never has to be primed due to the fact that it’s already submerged in fluid
