What is a battery? a group of galvanic cells connected in series a device that uses electrical energy to produce a chemical change a group of half-cells connected in parallel none of the options

The correct answer is **a group of galvanic cells connected in series**.<br /><br />Here's why:<br /><br />* **Battery:** A battery is a device that converts chemical energy into electrical energy. It does this through electrochemical reactions within its cells. Connecting multiple galvanic cells (also known as voltaic cells) in series increases the overall voltage output of the battery.<br /><br />* **Galvanic Cell:** A galvanic cell is a single electrochemical cell that spontaneously produces electricity through a redox reaction.<br /><br />* **Series Connection:** Connecting cells in series means the positive terminal of one cell is connected to the negative terminal of the next. This additive arrangement increases the total voltage.<br /><br />* **Parallel Connection:** Connecting cells in parallel (positive to positive, negative to negative) increases the total current capacity but maintains the same voltage as a single cell.<br /><br />* **Electrical energy producing chemical change:** This describes electrolysis, the opposite process of what a battery does. Electrolysis uses an external electrical source to drive a non-spontaneous chemical reaction.<br />