Question

Give the essential difference between the nature of
electric and magnetic field lines.

Answer 1

I read this online is this correct?
"The electric field is a pole, the magnetic field is a dipole in nature, magnetic monopoles though acceptable by the theories, have not been found."

Answer 2

Yes that sounds correct.

The are no such things as magnetic monopoles but there are two types of electric charge.

So electric field lines start on a positive charge and finish on a negative charge.
Magnetic field lines can form a closed loop.