When a ferromagnetic material is subjected to an external magnetic field, the domains within that material tend to align with the direction of the magnetic field. Therefore, the correct answer is:
They face the same direction creating a stronger magnetic field.
As the domains align, the material becomes magnetized, resulting in a cumulative effect that enhances the overall magnetic field of the material. This alignment occurs due to the interaction between the magnetic moments of the domains and the external magnetic field, leading to the material becoming magnetically polarized.
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