Lack of moisture in the air causes low amounts of rainfall, and rainfall is just one form of precipitation. Given these facts, what causes low amounts of precipitation among the following options:
- Plant growth is reduced
 - a hemisphere is tilted away from the sun
 - more condensation
 - extra moisture in the air
 - excess water supply
 - fissures of hot, acidic water
 - lack of moisture in the air
 - a tree falling


 

       lack of moisture in the air  