Final answer:
The present day Earth has greater elevation differences compared to the supercontinent Pangea.
Step-by-step explanation:
The question asks whether there would be greater elevation differences during the supercontinent Pangea or in the present day Earth. The correct answer is B. Greater elevation differences in the present day Earth. This is because the current Earth has active tectonic plate movement, which creates various types of topography such as mountains, valleys, and plateaus. In contrast, during the time of Pangea, the continents were merged together, resulting in a more unified and less varied topography.