Fact 1: Harming an animal species has a negative impact on the population size of that species.

Fact 2: All dogs are animals .

Given the two facts above, answer the question "what species has a negative impact on population size when they are harmed?" with the following options: 
- clouds
 - water
 - humans
 - Bats
 - aliens
 - Cars
 - dogs
 - squids


 

       dogs  