Final answer:
Voltage is the term defined as the driving force that initiates the flow of current in an electrical circuit.
Step-by-step explanation:
The term defined as the driving force that makes current flow in a circuit is voltage (A). Devices like batteries, generators, and wall outlets create a potential difference and are referred to as voltage sources. When these sources are connected to a conductor, they apply a potential difference (V), which creates an electric field. This field then exerts a force on charges, causing them to move and generate an electric current. According to Ohm's Law, discovered by Georg Simon Ohm, this flow of current is directly proportional to the applied voltage, meaning higher voltage leads to a greater current, as long as the resistance of the material remains constant.