People need the wood from the forest ecosystem for Lumber, Mulch, and Paper and other wise, since this is multiple choice, for choice D. Is all of the above, hen you correct answer is D. All of the above.
Hope that helps :)
~Ans~
Do you know what a pangea is well Pangea is another supercontinent the reason why we're not Pangea is because something dead which oceans with lava cools off it cools off from old to new the new rocks are pushing the consonants together and eventually and a couple of million years it will be Pangaea again