Answer:
I just took the test the answer is Apsidal precession.
The answer is c because the precession of the ecliptic was component of a milankovitch cycle and is related to periodic ice ages through out history
Answer:The rocks are smooth due to the water eroding the rocks.
Explanation:
The water slowly takes off minerals of the rocks every time is splashes over them. Over time the rocks bumpy surface would be eroded away giving it a smoother surface.
