When water is used for irrigation, only about one-half can be used again. much of this water is lost for use on land because it back into the air.

a)
condenses

b)
evaporates

c)
precipitates

d)
transpires

When the temperature rises it can cause the enzyme to get denatured

Dis the correct answer thats what i put and it was right 

Ibelieve the answer is relative humidity  because it makes more sense that way. solar flares usually occur in space it doesn't affect the earth, well it could but it wont make a significant damage.  latitude is land it doesnt do anything. prevailing winds, i dont know the correct meaning for this but i doubt that affects the land so it has to be relative humidity.