Answer: The correct answer is "interference".
Explanation:
Interference: It is a phenomenon in which there is a superposition or a overlapping of the waves occur in the same medium. The resulting wave may have minimum amplitude or maximum amplitude. The interference can be : constructive and destructive depending on the amplitude of the resulting wave.
When the frequencies of the waves are not identical but they are similar interfere then the resulting wave is a beat frequency. Beat frequency is a pulsing sound. It goes up and down in loudness.
When you listen to the radio, you hear two stations at once. This interaction of this wave is interference.
Therefore, the correct option is (B).
