According to scientists, many years ago their was a supercontinent called "Pangaea." As years went by, the continents slowly drifted apart which is what's today. However, from recent discovers, scientists predict that in about 250 millions years from now the continents will merge again, however this time, in a different order ("Pangaea Ultima"). So the answer to your question is D.
Hope this helps. :D
Answer:
sun to plants, plants to animals, animals to waste I believe
A hammer is a lever, one of the six types of simple machines.
The vertebrae protects the spinal cord
