How do cells operate within a circuit?

Cells operate within a circuit by releasing electrons when a circuit is completed, which is a fundamental aspect of electric current. A cell, often referred to in the context of batteries, generates electrical energy through chemical reactions that occur inside it. When a circuit is connected, these reactions allow electrons to flow from one terminal of the cell to another, creating an electric current.

This flow of electrons is essential for powering electronic devices. The movement of electrons constitutes the electric current that moves through the circuit, enabling it to function properly. Understanding this concept is crucial for grasping how electrical sources like batteries deliver energy to systems they power.

In contrast, while some cells can store energy for later use, the specific operation of cells in the context of a circuit predominantly involves the release of electrons rather than energy storage alone. The other options involving reactions between cells to create sound or converting sound into electrical energy do not accurately describe the primary function of cells in a circuit.