The Spanish would most likely try to recruit allies to defeat the armies of the Aztecs since the Spanish were bent on defeating the Aztecs and conquering Mexico. This would have been a strategy to create hegemony over this part of the New World.
Ethopia you can see this because that's the only one that is under 50% the other ones are over 50% and the question is in which country do .... make up LESS than half of the total population which half means 50%
Antarctica. There's conflicting info on this one but as far as your test/research goes, it's most certainly not any of the others.
2,996 people die that tragic day