Magnetism can cause objects to repel each other, and an object is a real-world thing. Given these facts, magnetism can cause what to repel each other among the following options:
- electromagnetic energy
 - flow of electrons
 - Veins and arteries.
 - barnacles
 - solid, liquid, gas
 - an electron lens
 - real-world things
 - Electrical energy


 

       real-world things  