What is the force that causes the flow of electricity?

The force that causes the flow of electricity is known as voltage, measured in volts. Voltage is the potential difference that pushes electric charge through a circuit, enabling current to flow. It can be thought of as the "pressure" that drives electrons through a conductor. The greater the voltage, the more potential energy is available to move charges, resulting in a stronger flow of electricity.

In contrast, other choices represent different electrical concepts. The ampere, for example, is a unit of measurement for electric current, representing the flow of electric charge. Ohm refers to resistance, which measures how much a component resists the flow of electricity. Watt is a unit of power, representing the rate at which electrical energy is transferred. These concepts are essential to understanding electricity but do not define the force that initiates the flow.