Why do magnetic lines of force prefer to pass through ferromagnetic materials?

What do magnetic lines of force represent ?

Magnetic lines of force prefer to pass through ferromagnetic substances than air,because permeability for ferromagnetic substances is

Why do magnetic lines prefer to pass through ferromagnetic substances (e.g. Fe) than through oil?

The magnetic lines of force prefer to pass through iron than air. Explain why?

Magnetic force can pass through non-magnetic materials.

The electric lines of force do not passes through