Here's why:
* Electromagnetism: This force governs the interaction between electrically charged particles. Like charges repel (e.g., two positive charges push away from each other), while opposite charges attract (e.g., a positive and a negative charge pull towards each other).
Let's look at the other forces:
* Strong Nuclear Force: This force holds the nucleus of an atom together, attracting protons and neutrons. It doesn't repel.
* Weak Nuclear Force: This force is responsible for radioactive decay and doesn't exhibit attraction or repulsion in the same way as electromagnetism.
* Gravitational Force: This force attracts objects with mass. It doesn't repel.
