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

Fact 2: Pollution from garbage can harm cave animals.

Given the two facts above, answer the question "How can pollution from garbage affect cave animals?" with the following options: 
- increase populations
 - reduce populations
 - attract predators
 - Pesticides
 - Make them lose their sight
 - Plant growth is reduced
 - organisms and their habitat
 - cause their death


 

  reduce populations       