The initial factor is the moon's size, which is relatively small compared to the Earth, meaning it has less gravity. This means that more gas is allowed to escape from the surface, which means that there is no atmosphere. This leaders to highly fluctuating temperatures.
The answer is D. (Russia)
The answer is c. reverse its polarity.
The water cycle is extremely important process because it ensures the availability of water for all living organisms and regulates weather patterns on our planet. If water didn't naturally recycle itself, we would run out of clean water, which is essential to life.