What type of electrical circuit provides a path for current to flow between the positive and negative terminals of a power supply?

A closed circuit is defined as a complete electrical circuit that allows current to flow uninterrupted from the positive terminal of a power supply, through the various components of the circuit, and back to the negative terminal. In a closed circuit, all connections are intact, enabling the flow of electricity to perform work, such as powering devices or lighting up a bulb.

In contrast, an open circuit is characterized by a break or interruption in the path, which prevents current from flowing. For a circuit to function properly, it must be closed; any break in the circuitry leads to an open condition, halting the flow of current.

Incomplete circuits, as the term implies, refer to those that lack necessary connections or components, further inhibiting current flow but not necessarily conforming to the strict definition applied in electrical terminology.

Lastly, while series circuits involve multiple components connected along a single pathway, the term "closed" specifically addresses the ability of current to flow continuously without interruption. Therefore, the focus on the flow of electric current leads to the conclusion that the most appropriate answer is that a closed circuit provides the required pathway for current to flow between the positive and negative terminals of the power supply.