It is the inner core. So, B.
Answer:
Sound energy is converted into electrical energy in a microphone.
Electrical energy is converted into sound energy in a loud speaker.
Electrical energy is converted into mechanical energy in a motor.
Mechanical energy is converted into electrical energy in a generator.
Explanation:
mark me as the brainlist:)
I am almost sure it is frequency :)
I hope this helps!
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a phenomenon whereby the moon appears bluish owing to smoke or dust particles in the atmosphere