Magnetism can cause objects to repel each other.
An object is a real-world thing.
Magnetism can cause real-world things to repel each other.
Magnetism can cause what to repel each other?
[1] electromagnetic energy
[2] flow of electrons
[3] Veins and arteries.
[4] barnacles
[5] solid, liquid, gas
[6] an electron lens
[7] real-world things
[8] Electrical energy