Fact 1: Harming an animal species causes that animal 's population to decrease.

Fact 2: Killing snakes is more than unnecessary and harmful to the ecosystem.

Given the two facts above, answer the question "What can killing snakes cause?" with the following options: 
- Snake population decrease.
 - DNA damage and mutations
 - Snake population variation.
 - death and devastation
 - dead organisms
 - Snake population increase.
 - Destroy crops
 - Snake population stabilization


 

 Snake population decrease.        