You are presented with the question "What has a negative impact on people, animals and plants?" and the following answer choices: 
- steroids
 - liver cancer
 - disease
 - influenza
 - drought
 - landfills
 - deforestation
 - bacteria

Now knowing that landfills have a negative impact on the environment and people, animals and plants are threatened with massive destruction of their environment, choose the best answer.


 

      landfills   