Nancy applies a force to a violin string by pulling her bow across it. The vibrations of the string produce sound waves, which c
ause the wooden portion of the violin to vibrate at its natural frequency. The violin is designed so that a string vibrates at a frequency that matches the natural frequency of the wooden portion of the instrument. So repeatedly pulling the bow across this string allows _______ to occur.
A.
sound
B.
harmony
C.
muting
D.
resonance
