Question

The shrillness of sound is determined by the (a) frequency of vibration (b) wavelength of vibration (c) amplitude of vibration (d) time period of vibration​

Answer 1

$\huge\boxed{\fcolorbox{black}{pink}{Answer}}$

The shrillness of a sound is determined by the frequency of vibration.

Answer 2

$\huge\boxed{\fcolorbox{red}{yellow}{Answer}}$

The shrillness of sound is determined by frequency of vibration.