Answer: The correct answer is "near both magnetic poles".
Step-by-step explanation:
Bar magnet is the permanent magnet. It has two poles: South pole and North pole. The poles of the bar magnet are fixed. Th poles cannot be changed.
The strength of the magnetic field can not be increased or decreased. The domains of the permanent are permanent aligned.
Same poles repel each other. The opposite poles attract each other.
Magnetic field lines are the surrounding around the magnet in which the magnetic force can be experienced. The lines of magnetic force are stronger near both magnetic poles. The strength of the magnetic field lines of force decreases with distance from the poles.
Therefore, the correct option is (A).