Input (grade 13): A magnetic field is a field of force produced by moving electric charges, by electric fields that vary in time, and by the 'intrinsic' magnetic field of elementary particles associated with the spin of the particle. There are two separate but closely related fields to which the name 'magnetic field' can refer: a magnetic field and a magnetic field.
Output (grade 10): The electric field and the magnetic field are components of the electromagnetic field.