Here's why:

* Electric Charge: Electric charge is a fundamental property of matter. There are two types of electric charges: positive (+) and negative (-).

* Electromagnetic Force: The force between charged objects is called the electromagnetic force. This force can be attractive or repulsive depending on the charges involved.

* Like Charges Repel: Objects with the same type of charge (both positive or both negative) exert a repulsive force on each other. Think of it like pushing two magnets together with the same poles facing each other.

* Opposite Charges Attract: Objects with opposite charges (one positive and one negative) exert an attractive force on each other. This is similar to pulling two magnets together with opposite poles facing each other.

The key takeaway: Opposite charges attract, and like charges repel. This fundamental principle is at the heart of many phenomena in physics, including the behavior of atoms, electricity, and magnetism.