Question

What causes a magnetic field to form around certain metals, such as iron?

Answer 1

A.
The majority of the domains are aligned.


B.
The majority of non-metal atoms are aligned.


C.
The majority of the atoms have been acted upon by gravity.


D.
The majority of the protons are aligned.

Answer 2

If it's iron dust they form the lines of the magnetic field.
http://www.magnetyze.com/image.axd?picture=2012%2F3%2Fmagnetic-field-iron-shavings.jpg