In adults, stem cells remain undifferentiated until they are needed to repair or replace other cells. Stem cells can produce cells that are identical to themselves.
Answer:
Location B, because cracks between plates are filled with molten rocks which solidify
Explanation:
Location B because, as the tectonic plates move away under the sea, inside the sea are cracks of the ocean floor that releases molten rocks, or a type of liquid that hardens when interacting with liquid (thats from the mantle).