The average rate of erosion on the Moon is far less than on Earth ...

[Bernana]

The average rate of erosion on the Moon is far less than on Earth because
 
  A) the crust of the Moon is much denser than the Earth's crust.
  B) the Moon is much younger than the Earth.
  C) the Moon lacks wind, water and an atmosphere.
  D) the Moon's magnetic field protects it from the solar wind better than ours does.
  E) the Moon's mare long ago dried up, so there is no more wave erosion there.

Question 2

What kind of surface features may result from tectonics?
 
  A) mountains
  B) valleys
  C) volcanos
  D) cliffs
  E) all of the above

[nothere]

Answer to Question 1

C

Answer to Question 2

E