Magnetism is an example of because it is able to push and pull things.

It's a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects

In one word it is an example of a force

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms