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

Fact 2: Populations are groups of individuals of the same species.

Given the two facts above, answer the question "Harming an animal species has a what on the size of a group of individuals of that species?" with the following options: 
- Abnormal cell growth
 - uncontrolled
 - net growth
 - positive effect
 - massive damage
 - negative impact
 - non-negative impact
 - major threat to health


 

      negative impact   