Final answer:
An electric circuit requires a power source and a conductive path for electrons to function, enabling electric current to flow and complete the circuit.
Step-by-step explanation:
To work properly, an electric circuit needs at least two essential components: a power source and a conductive path for electrons. The power source, such as a battery, provides the necessary electrical energy that drives the current through the circuit. On the other hand, the conductive path, typically made from metals like copper in the form of wires, offers a low-resistance route for electrons to flow. Additional elements like resistors, switches, and loads (like light bulbs) can also be part of the circuit to control and utilize the electric current. In a simple circuit, the current flows from the positive terminal through the components, returning to the negative terminal of the power source, thus making a complete loop.