Answer:
I believe that they are decendents of the earliest split from ancient Eurasian populations.
Assuming this involves another form of shifting tectonic plates, the answer would be earthquakes. Another form of the question is asking for continental drift.
Climatologists warn of a tipping point when global temperatures trigger catastrophic events like the melting of the polar ice cap and this will result in sea levels rising more than 50 feet. The correct option among all the options that are given in the question is the last option. That would be the day of doom for most people living on planet earth.
