Identify the true statement. choose one: a. the earth's magnetic field is generated in the liquid outer core. b. the inner core is getting smaller. c. the outer core conducts because of thermal convection. d. the base of the outer core is always denser than the upper part of that layer.

A. The Earth's magnetic field is generated in the liquid outer core

Explanation:

Due to the presence of molten liquid the earth outer core on earth producer current that makes in motion the current that creates the heats and this form of heat then tens to escape and reaches out into the layers of the earth as the process of a dynamo. The spinning of the earth and the Coriolis force thus caused the liquid iron to generate the electric currents that in general creates the magnetic waves and the magnetic fields are created.

Answer volcanic outgassing;