All I really know about Karl Marx is that he didn't like capitalism. So I would have to say the invention of capitalism.
Wave of invader swept across Western Europe<span> (Vikings, Franks, Goths, and Huns) trade slowed down to a trickle (people became more isolated) towns became empty, and classic learning just stopped.</span>
Answer:
water and soil.
Explanation:
I have second thoughts, the inner core is made up of iron and nickel, it is the hottest layer of the Earth and it has a temp of 5500°c, but that's a solid layer, the outer core is just the same, but the mantle, its the widest section of the earth and has a diameter of 2900km, its made up semi molten rocks called magma. So lets say: The Earth is made up of iron, nickel and semi molten rock.But the crust is made up rocks upon which we live.
Well....I would ASSUME that it's B. I'm just guessing here of course.
