Question

multiple choice question
the magnetic field that surrounds earth is due to
ions in the atmosphere
silicate rock in the mantle
magnetic metals in the inner core
molten iron and nickel in the outer core

Explanation:

The Earth's magnetic field is generated by the motion of molten iron and nickel in the outer - core, which creates electric currents and thus a magnetic field.

Answer:

molten iron and nickel in the outer core