Fact 1: Drought is when amount of precipitation decreases.

Fact 2: Some researches have reported that acid precipitation decreases crop productivity.

Given the two facts above, answer the question "Crop productivity does what during a drought?" with the following options: 
- stabilizes
 - threatened
 - reduce
 - increases
 - decreases
 - contracting
 - maintains
 - It expands


 

     decreases    