Gravity.

The strong interaction (strong force) and weak interaction (weak force) as well as the electromagnetic force are fundamental forces. The only one "missing" from this lineup is gravity, the fourth fundamental force in the universe.

It is a belief in the fundamental importance of improving the quality of social interaction for all people.

Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between a moving charge and an electromagnetic field is the source of the electromagnetic force, which is one of the four fundamental forces. Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between a moving charge and an electromagnetic field is the source of the electromag

The four fundamental forces of nature are gravity, the electromagnetic force, the strong force (strong nuclear force or strong interaction), and the weak force(weak nuclear force or weak interaction).