The flow of electric charge.

Here's why:

* Electric charge: The fundamental property of matter that causes it to experience a force when placed in an electromagnetic field. This charge can be positive or negative.

* Flow: The movement of these charged particles in a specific direction.

* Electric current: The rate at which electric charge flows past a point in a circuit.

Think of it like water in a pipe:

* Water: Represents the electric charge.

* Flowing water: Represents the electric current.

* Pipe: Represents the conductor (like a wire) through which the charge flows.

Let me know if you'd like more detail on any of these concepts!