Answer:
a region around a magnet in which you can measure magnetic forces.
Explanation:
Magnetic field is the field that surrounds the magnet so that when a magnetic material is placed in that region then that magnetic material will experience some magnetic force on it
this magnetic force is given by

here we know that
m = magnetic pole strength
B = magnetic field strength
so correct answer will be
a region around a magnet in which you can measure magnetic forces.