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

Fact 2: Ecosystems are living communities.

Given the two facts above, answer the question "Cutting down what has a negative impact on living communities?" with the following options: 
- bushes
 - on calories
 - habitat
 - manmade structures
 - invasive species
 - disease
 - bamboo
 - trees


 

        trees 