Which of the following has a positive terminal and a negative terminal?

A battery is a direct current (DC) power source, which means it has a defined electrical polarity consisting of a positive terminal and a negative terminal. Current is designed to flow in a specific direction from one terminal to the other. Components like standard resistors, fuses, and potentiometers are non-polarized passive components. This means they do not have specific positive or negative terminals and can be inserted into a circuit in either direction without affecting their basic function. While some specific components like electrolytic capacitors and diodes also have polarity, among the choices provided, only the battery has distinct positive and negative terminals.