When objects are magnetized what occurs to give them their magnetic properties?
they gain a magnetic force.
they gain magnetic properties.
they gain a magnetic pole.
their magnetic domains are aligned.

Their magnetic domains are aligned  is a correct option.

Explanation:

When the objects are magnetized their magnetic domain is the region in which all the atom are aligned in the uniform direction.

Which means that all the atom are aligned in the same direction when it magnetized.

Domains are the region present within the magnetic material.Magnetic domains which cause the magnetic behavior of the ferromagnetic materials such as alloys, cobalt, and iron.

Thus when the objects are magnetized magnetic domain experienced a magnetic field, and the atoms are aligned in the same direction and given them their magnetic properties.

heat a spark and oxygen

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion