Which of Earth's layers is comprised mainly of extremely hot liquid metals?

A.) inner core

B.) outer core

C.) mantel

D.) crust

The answer is A!

Yes. That is right.

The inner core is comprised mainly of extremely hot liquid metals which is simply within the mantle.

The inner core is comprised of liquid and highly-magnetic iron, this is what generates the magnetic field. The friction of the liquid metals create the magnetic sphere of the earth.