Antartica is surrounded by the southern ocean.
Answer:
B. it is based on the idea that all the present continents were one supercontinent
Explanation:
This is the answer because Pangaea is the name of the supercontinent whose existence is theorized. This theory supports plate tectonics because if it wasn't for plate tectonics, all the continents would still be a single large landmass.
Race, ethnicity, and nationality allow people to connect and be classified. I dont know what your lesson is though.