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Q: What causes sound?
  • A. Refraction
  • B. The vibration
  • C. Reflection
  • D. Rotation
Correct Answer: Option B - Sound is a form of energy that arises due to vibration or disturbance and is heard by reaching the audio senses. It is necessary to have a medium for transmission of sound. There is no transmission of sound in vacuum.
B. Sound is a form of energy that arises due to vibration or disturbance and is heard by reaching the audio senses. It is necessary to have a medium for transmission of sound. There is no transmission of sound in vacuum.

Explanations:

Sound is a form of energy that arises due to vibration or disturbance and is heard by reaching the audio senses. It is necessary to have a medium for transmission of sound. There is no transmission of sound in vacuum.