Answer:
10 years may pass without rainfall in the Rub al-Khali desert.
It is false that ten percent of the Earth's water is freshwater. In fact, it is around 3%.
B.
giraffes with short necks ate all the small trees. Giraffes with long necks were able to eat the short trees and the bigger trees. So when the smaller trees were finished the smaller giraffes died out and the taller giraffes passed the trait for having alonger necks along.
So B is your answer :)
Hail forms when its is A. SUPER cold and B they first have to accumulate into raindrops and then freeze, so basically they water molecules are just forming into regular rain and then the temperature suddenly drops the raindrops freeze and turn into hailstones.
Hope that helps!