Final answer:
The outer core, comprised of liquid nickel and iron, is responsible for the Earth's magnetic field through the creation of electric currents.
Step-by-step explanation:
The outer core is a layer of liquid nickel and iron believed to be responsible for generating the Earth's magnetic field. The Earth's core is composed of two parts: a solid inner core and a liquid outer core.
The liquid outer core's movement creates electric currents, which in turn produce magnetic fields. These magnetic fields combine to form the Earth's magnetosphere, which is crucial for maintaining our planet's magnetic field.