I'm really confused

Answer:
Crust = Base layer (the crust is like dirt, it is the thing that we walk on)
Lithosphere = Crust & upper-most solid mantle
Asthenosphere = The layer under the crust
Mantle = Right under the asthenosphere
Outer Core = Under the mantle (liquid)
Inner Core = Under the outer core (solid)
Explanation:
Hope this helps :)