You are presented with the question "What to an animal species causes increase in extinction rates?" and the following answer choices: 
- promoting
 - Pesticides
 - viruses
 - saving
 - harming
 - helping
 - wind
 - chickenpox

Now knowing that harming an animal species causes that animal 's population to decrease and studies of island populations have shown that extinction rates increase as area decreases, choose the best answer.


 

     harming    