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 am hesitating between 4 options to answer the following question, which option should I choose?
Question: What best describes the mantle of Earth?
Possibilities:
- 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

the largest layer between the crust and outer core