Explain what you understand by magnetic induction. What role does it play in attraction of a piece of iron by a magnet?

Explain the mechanism of attraction of iron nails by a magnet when brought near them.

Explain the following: When two pins are hung by their heads from the same pole of a magnet, their pointed ends move apart.

Explain the following: Several soft iron pins can cling, one below the other, from the pole of a magnet.

Explain the following::

The north end of the freely suspended magnetic needle gets attracted towards a piece of soft iron placed at a little distance away from the needle.

'Induction precedes attraction; Explain the statement.