You are presented with the question " uncontrolled use of what for fuel has a negative impact on an ecosystem" and the following answer choices: 
- trees
 - oil
 - deserts
 - habitat
 - solar
 - air
 - coal
 - rocks

Now knowing that cutting down trees has a negative impact on an ecosystem and an example is the uncontrolled cutting of trees for fuel, choose the best answer.


 

 trees        