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:
A.one-sixth is your answer hope this helps
Answer: radiation i think
Answer:
climatologists
Explanation:
they are the ones studying the effects of global warming on earth's climate
