Which definition most accurately describe working principle of DC motors?

Select one alternative:

DC motors converts alternating current into mechanical energy (armature rotation). The

direct current alters a poles of windings (electro magnets) creating rotation magnetic field

DC motors converts alternating current into mechanical energy (armature rotation). The

poles of permanent magnet attract and repel armature wire, where armature wire acts

like an electromagnet with switching poles

DC motors converts direct current into mechanical energy (armature rotation). The poles

permanent magnet attract and repel armature wire, where armature wire acts like an

electromagnet with switching poles

DC motors converts direct current into mechanical energy (armature rotation). The direct

current alters a poles of windings (electro magnets) creating rotation magnetic field