Question

Most materials are not magnetic because
a. they lack magnetic fields.
b. their magnetism has worn off.
c. their magnetic domains are arranged randomly.
d. Earth’s heat has destroyed their magnetism.

Answer 1

c. their magnetic domains are arranged randomly

In magnetized materials, all or most of the magnetic domains are arranged in the same direction 

Answer 2

Answer:

c. their magnetic domains are arranged randomly.      

Explanation:

A material is classified as a magnetic material if its domains are oriented in a single direction or can be oriented in the presence of a magnetic field. Example: iron, nickel, cobalt and materials made of their combination.

In non-magnetic materials, domains are randomly arranged. For example wood, silicon etc.

Due to heat or hammering, a magnet can lose magnetic properties as the orientation of domains becomes random.