Final answer:
The unit that measures the force driving electric current through a conductor is the (b) Volt. It defines electric potential or electromotive force, while Ampere measures electric current.
Step-by-step explanation:
The unit that measures the pressure or force that pushes electric current forward through a conductor is the Volt (b). The Volt is the derived unit for electric potential, electric potential difference, and electromotive force. It is a measure of the force that drives the flow of electrons (electric current) through an electrical conductor, such as a wire.
Meanwhile, the Ampere (Amp) is a unit of electric current, Ohm is a unit of electrical resistance, and Watt is a unit for power, which is the rate of energy transfer or the rate of doing work. Ohm's Law relates these units and says that the voltage across a resistor equals the current through the resistor (amperes) multiplied by the resistance of the resistor (ohms).