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

Fact 2: Species are the different kinds of organisms.

Given the two facts above, answer the question "What is impacted from harming a kind of animal?" with the following options: 
- no impact
 - Pesticides
 - species in other environments
 - that animals' prey
 - an object
 - population size
 - Endocrine system
 - most organisms


 

      population size   