You are presented with the question "Ecosystem complexity generally what from the poles to the equator" and the following answer choices: 
- decreases
 - is constant
 - trees
 - increases
 - stays the same
 - environment
 - Plants growth
 - adding heat

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


 

    increases     