What causes opposition to any voltage change in a circuit?

The correct answer highlights the role of capacitance in a circuit. Capacitance refers to the ability of a component, typically a capacitor, to store and release electrical energy in a circuit. When there is a change in voltage across a capacitor, it resists that change because it takes time to charge or discharge. This characteristic leads to a temporary opposition to voltage changes.

In practical terms, if the voltage in a circuit suddenly increases, the capacitor will initially oppose this change by absorbing some of the excess energy until it can adjust and reach the new voltage level. Therefore, capacitance plays a pivotal role in the dynamic response of circuits to changes in voltage, impacting how circuits react to alternating current (AC) signals and sudden transients.

Understanding capacitance and its effects is crucial for analyzing circuit behavior, especially in applications involving timing, filtering, and signal processing.