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

Fact 2: Regular overfishing can decline an animal population to the point of extinction.

Given the two facts above, answer the question "What can result in extinction?" with the following options: 
- Harming an animal species
 - scattered light
 - exposure to cold
 - Ignoring an animal species
 - deforestation
 - Helping an animal species
 - DNA damage and mutations
 - Growing food for animals


 

 Harming an animal species        