Magnetic force required to demagnetize the material
A.) Retainity
B.) Coercivity
C.) Energy Loss
D.) Hysteresis

Hint: The magnetic force is a result of the gravitational force, one of nature's four fundamental forces, and it is induced by the charging motion. Two objects with charge with the same direction of motion have a gravitational force of attraction between them. Similarly, objects with the charge going in opposing directions have within them a repulsive force.

Complete step-by-step answer:

For a ferromagnetic material, coercivity is the magnetic field force that must be exerted to reduce the magnetization to zero as the magnetization of the sample exceeds saturation.
It is 'Magnetic Field Intensity' instead of 'Magnetic Force.'

Coercivity is a measure of a ferromagnetic material's ability to resist an exterior magnetic field without being demagnetized. The equivalent property in the discipline of electrical engineering and materials, electrical manipulation, is the potential of a ferroelectric material to withstand the artificial electrical force without being depolarised.

Hence option B is the right answer.

Note: Coercivity of a ferromagnetic material is the force of the applied magnetic field required to decrease the magnetization of the substance to zero following relaxation of the magnetization of the sample. Hence Coercivity tests the resistance of a ferromagnetic material to demagnetization. Coercivity is typically expressed in oersted units or ampere/meter and is referred to as \[{H_C}\]. More relevant is the intrinsic coercion \[{H_{Ci}}\] which does not take into account the negative contribution of vacuum permittivity to magnetic field B, considering only the magnetization.