In ground or surface wave propagation, the ions of power in a signal wave is due to

Options

A. induced charges in earth which travel in ground along with the wave, resulting the alternating currents in the earth's surface
B. interference of waves
C. diffraction of waves
D. high frequency of signal wave.

Explanation

In ground or surface wave propagation, the loss of power in a signal wave is due to attenuation, i.e. the absorption of energy by the earth which inturn is due to induced charges in earth which travel in ground along with the wave, resulting in the alternating currents in the earth's surface, as well as due to tilting effect, i.e., diffraction of waves.