Fact 1: Lack of moisture in the air causes low amounts of rainfall.

Fact 2: Humidity is moisture in the air.

Given the two facts above, answer the question "Lack of what in the air causes low amounts of rainfall?" with the following options: 
- humidity
 - Bodily water
 - aridity
 - Dehydration
 - sweating
 - nutrients
 - drought
 - dryness


 

 humidity        