Answer:
disagree, because mars has little to no oxygen
Yes, it is true that the<span> core of the Earth is believed to be composed of iron and nickel, since the inner core is believed to be made of iron, with the outer core being made of nickel. </span>
D: Communism. A major example would be the USSR and their "overnight industrialization" that took place in the 1920's-1930's
