Fact 1: Magnetism can cause objects to repel each other.

Fact 2: The maglev trains are pushed and speeded up by the fact that like poles attract and unlike poles repel.

Given the two facts above, answer the question "What is used in order for Maglev trains to function?" with the following options: 
- coal
 - Energy.
 - electrically
 - energy
 - magnetism
 - diesel
 - tow rope
 - power


 

     magnetism    