1. It is home to MILLIONS of different species .There are potentially millions of animal and plant species that are yet to even be discovered that live in rainforests
2.They produce a lot of our foods, bananas, coffee beans and chocolate etc.
3.It helps us breathe clean are that isn't filled with toxins
Groundwater is below the surface, and using the process of elimination, you will be left with the first choice, carves landscapes from BELOW the surface.