You are presented with the question "What is impacted from harming a kind of animal?" and the following answer choices: 
- no impact
 - Pesticides
 - species in other environments
 - that animals' prey
 - an object
 - population size
 - Endocrine system
 - most organisms

Now knowing that harming an animal species has a negative impact on the population size of that species and species are the different kinds of organisms, choose the best answer.


 

      population size   