Asthenosphere is the answer of this question. It best describes the all above mention properties.
Asthenosphere is the the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
Answer:
B. toward the center of the earth
It was possible that the theory of continental drifts caused water levels to rise, thus making the pieces of so-called Pangaea not fit perfectly.
Another theory could be due to weathering and erosion of the continents to create a new shape of each continent.
