the world's current population is 7.3 billion and the world population in 1915 was 1.8 billion. The increase over the past century is 7.3 billion - 1.8 billion = 5.5 billion. So, the correct answer would be "more than 5 billion" (option D).
The answer would be Nobles and Priests.
No human inhabitants because Polar vortex win lower temperatures in the Antarctic .
A. Place
It"s referring to a specific location.
