Which type of video signal transmits information continuously in the form of a wave?

The correct answer is that analog video transmits information continuously in the form of a wave. Analog video represents visual information by varying the amplitude or frequency of an electrical signal, which is a continuous waveform. This means that analog signals can represent an infinite range of values, allowing for a more fluid representation of motion and color on the screen.

In contrast, digital video encodes the information as discrete values, using binary code to represent pixels and frames. This method does not utilize a continuous waveform; instead, it samples the video signal at intervals, which may result in quantization errors despite offering improved clarity and noise resistance.

HD video and standard video are categories that can be either analog or digital, depending on how they are transmitted. However, when considering the nature of the signal itself, the defining characteristic of analog video as a continuous waveform distinguishes it as the correct choice.