Experiment: Click Advance year to year 20. What changes occurred?

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

Ibelieve the answer is weathering,hope my answer has you : ) 

The answer would be solvent