Fact 1: Bottleneck effect occurs when a population suddenly gets much smaller.

Fact 2: Effects of bottlenecks are unpredictable .

Given the two facts above, answer the question "What is the effect of a population suddenly getting much smaller?" with the following options: 
- major threat to health
 - Decreased precipitation
 - a lot of human deaths
 - movement of tectonic plates
 - it is unpredicatbale
 - If they can no longer get food
 - Plant growth is reduced
 - enormous damage to homes


 

     it is unpredicatbale    