The correct answer is: A. voltage
In a thermal system, temperature is a measure of the average kinetic energy of the particles in a system. In an electrical system, voltage is a measure of the potential difference between two points in a circuit. The higher the temperature, the faster the particles are moving, and the higher the voltage, the greater the potential difference.
Option B, current, is the flow of charge through a circuit. It is analogous to the rate of heat transfer in a thermal system.
Option C, capacitance, is the ability of a system to store charge. It is analogous to the thermal mass of a system, which is its ability to store heat.
Option D, charge, is the amount of electrical charge that is present in a system. It is analogous to the mass of a system, which is the amount of matter that is present in a system.
Option E, none of the above, is incorrect because temperature is analogous to voltage.