Why are rain forests important to the world? (more than one answer) a)species found in the rain forest have been used for medical purposes. b)rain forests are the natural habitat for 30 percent of the world's plant and animal species. c)rain forests are a valuable food source for the world. d)rain forests increase greenhouse gases.

I think it's B yea B is the answer i think 

This is what i found “getting into the technicalities, the continental crust has a density of around 3.0 g/cm3 compared to 2.6 g/cm3 of the continental crust. in addition, the continental crust is much thicker than the oceanic crust. the recycling process does not happen to the continental layer.” i hope this you for what your looking for. can you plz mark me brainliest?