Answer: earth science is made of many branches of knowledge concerning all aspects of the earth system
Explanation:
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).
Becusse ppl view points are diffrent
Finances i think but not 100% on that