Which of the following is the amount of energy that a signal waveform carries, measured in Volts?

The correct choice is the amplitude, as it represents the maximum extent of a signal waveform's deviation from its rest position. In terms of electrical signals, amplitude correlates to the amount of energy carried by the signal waveform, which is measured in volts. Essentially, higher amplitude means a stronger signal, indicating that more electrical energy is present.

While amplitude is indeed a critical factor in determining the strength of a signal, other options like power and voltage level also relate to signal characteristics but do not define the energy of the waveform as directly. Frequency, which indicates how often the waveform cycles occur within a specified time, does not measure energy but rather the rate of oscillation of the signal. Understanding these concepts helps clarify how signals convey information and the significance of amplitude in audio-visual systems.