What is used to move a sufficient number of electrons from atom to atom?

The movement of a sufficient number of electrons from atom to atom is primarily facilitated by voltage. Voltage, or electric potential difference, acts as the driving force that pushes electrons through a conductor, enabling them to flow from one atom to another. This flow of electrons constitutes an electric current.

In practical terms, voltage can be thought of as the "pressure" that moves electrons in a circuit. When there is a voltage applied across a conductor, electrons that are loosely bound to their respective atoms can be freed and move toward areas of lower electric potential. This movement of electrons is what establishes an electric current in the circuit.

While current itself is a result of the movement of electrons, voltage is the essential factor that initiates and sustains that movement. Heat, on the other hand, relates to energy and not specifically to electron movement, while inductance pertains to the property of a conductor to oppose changes in current due to its magnetic field. Hence, voltage is the correct answer as it directly correlates to the ability to move electrons effectively.