The main reason is that there is no atmosphere. This means that there is no weather and no weather means that there is no wind or rain. Wind and rain are main components of erosion and because there is no erosion, craters can stay preserved for a very long time.
Hope this helps!!
The answer would be an Ecologist
All the blood types are A+, A-, B+, B-, O+, O-, AB+, and AB-.
I think it's B because waxing crescent and first quarter is a small part of the full moon
