Fact 1: Cutting down trees has a negative impact on an ecosystem.

Fact 2: Loggers have been careless in where they cut down trees.

Given the two facts above, answer the question "What has a negative impact on an ecosystem?" with the following options: 
- health
 - Pollution
 - Pesticides
 - time
 - disease
 - sunlight
 - loggers
 - Cars


 

       loggers  