You are presented with the question "What can have a negative impact on the population size of a species?" and the following answer choices: 
- rainstorms
 - A virus
 - sexual reproduction
 - genetic diversity
 - deforestation
 - massive damage
 - Smoking
 - pesticides

Now knowing that harming an animal species has a negative impact on the population size of that species and small animals are harmed by pesticides, choose the best answer.


 

        pesticides 