You are presented with the question "Where is ecosystem complexitiy generally least?" and the following answer choices: 
- humans disturb it
 - frontal zones
 - in lakes
 - at the ocean
 - our planet
 - at the poles
 - mouth of rivers
 - at the equator

Now knowing that biodiversity generally increases from the poles to the equator and biodiversity contributes to ecosystem complexity, choose the best answer.


 

      at the poles   