You are presented with the question "what has a negative impact on the ecosystem when cut down?" and the following answer choices: 
- humans disturb it
 - scarce resources
 - Smoking
 - disease
 - black spruce
 - swamp vegetation
 - deforestation
 - Pesticides

Now knowing that cutting down trees has a negative impact on an ecosystem and black spruce is the dominant tree species, choose the best answer.


 

     black spruce    