Fact 1: Biodiversity increases the productivity and stability of ecosystems.

Fact 2: Ecotourism, on the other hand, can help to conserve biodiversity.

Given the two facts above, answer the question "What increases the stability of ecosystems?" with the following options: 
- overpopulation
 - water consumption
 - loose soil
 - Quality of life
 - agriculture
 - deforestation
 - ecotourism
 - trees


 

       ecotourism  