Fact 1: Biodiversity generally increases from the poles to the equator.

Fact 2: Biodiversity contributes to ecosystem complexity.

Given the two facts above, answer the question "Ecosystem complexity generally what from the poles to the equator" with the following options: 
- decreases
 - is constant
 - trees
 - increases
 - stays the same
 - environment
 - Plants growth
 - adding heat


 

    increases     