1. Strong Nuclear Force: This force binds protons and neutrons together in the nucleus of an atom. It's the strongest of the four forces but has a very short range of action, only operating within the nucleus.

2. Electromagnetic Force: This force governs the interactions between electrically charged particles. It's responsible for holding atoms together, for chemical reactions, and for the existence of light.

3. Weak Nuclear Force: This force is responsible for radioactive decay and is involved in processes that involve the creation and annihilation of subatomic particles. It's weaker than the strong force and also has a short range.

4. Gravitational Force: This force is the weakest of the four but has an infinite range. It's responsible for the attraction between any two objects with mass and is what holds the Earth in orbit around the Sun.