a thin layer that is located on the surface a solid layer made of iron and nickel the largest layer between the crust and outer core the smallest layer that is made up of molten rock
I gave my students this multiple choice question: What best describes the mantle of Earth?

Only one answer is correct among these 4 choices:
- a thin layer that is located on the surface
- a solid layer made of iron and nickel
- the largest layer between the crust and outer core
- the smallest layer that is made up of molten rock

Could you tell me which one is correct?

the largest layer between the crust and outer core