Why does Mars preserve about 30% of its craters despite having an atmosphere and wind erosion?

Mars has an atmosphere, but it is much thinner than Earth's, so it produces less weathering and erosion overall. Wind can move dust and gradually alter the surface, but it is not strong enough to erase most craters quickly. Thus, the correct choice is “Its atmosphere is too thin to cause significant erosion.”

AI-written and checked against the verified answer.