ANSWER:
Condition we are looking at is upon the majority of the precipitation, when the process starts.
EXPLANATION:
It starts falling down to the ground. At its early state is formed in the form of snow, in high altitude the temperatures is pretty low. Snowflakes are produced in the process above the freezing level.
That is less than 32-degree F and it starts to fall down to the earth. It starts to fall in the form of snow. Later when it comes in contact with air than it starts to rain.
It depends on the marble. For example, the famous marbles from Carrara would have a geological age of 200 million years.
erode means to wear away slowly
I think erode is the word your looking for but these are some other words
diminish, lessen, pare, shave, trim, carve, chip, consume, decrease, fashion, form, hew, model, mold, sculpt, shape, undermine, eat away, and wear away
B. a nationless state
C. a centripetal force
D. separatism
E. fragmentation