The tiny particle that flows around a circuit is an electron.

Here's why:

* Electric Current: Electric current is the flow of electric charge.

* Charge Carriers: In most circuits, electrons are the primary charge carriers. They carry a negative charge.

* Movement: Electrons move from a region of high potential energy (negative terminal) to a region of low potential energy (positive terminal). This movement creates an electric current.

Let me know if you'd like to know more about how electrons flow in circuits!