The diagram shows magnets aligned so they will attract each other is D. as it shows the magnetic pole is showing attraction.
A magnetic pole, placed at every give up of a magnet in which the outside magnetic area is strongest. A bar magnet suspended in Earth's magnetic area orients itself in a north-south direction. The north-looking for pole of one of this magnet, or any comparable pole, is known as a north magnetic pole.
A magnet continually comes with poles: a north pole and a south pole. The major distinction between north and south pole is that a north pole is attracted toward the south pole of any other magnet whilst a south pole is attracted toward the north pole of any other magnet.
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