Which of the following describes the flow of electricity?

The flow of electricity is fundamentally described as the movement of electrons. Electrons are subatomic particles with a negative charge that circulate through conductive materials, such as metals, when a potential difference (voltage) is applied. This movement establishes an electric current, which is the primary principle behind how electrical devices operate and transfer energy.

In contrast, the other options do not accurately define the flow of electricity. The flow of neutrons, for example, is not related to electric current; neutrons are neutral particles found in atomic nuclei and do not contribute to electrical conduction. The static charge in a battery refers to potential energy stored and is not about the flow but rather the potential for electrons to move. Lastly, the warmth generated by electrical components is a result of electrical energy being converted into thermal energy due to resistance in the circuit, but it does not describe the flow of electricity itself. Therefore, the correct choice emphasizes the crucial role of electrons in the generation and flow of electrical energy.