Decibel is the unit for: A) speed of light B) radio wave frequency C) intensity of sound D) intensity of heat?

Decibel, (dB), unit for expressing the ratio between two amounts of electric or acoustic power or for measuring the relative loudness of sounds. One decibel (0.1 bel) equals 10 times the common logarithm of the power ratio—i.e., doubling the intensity of a sound means an increase of a little more than three dB.

Option C is the correct choice.

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 and agree with answer colleagues and the God bless

The decibel is a unit for sound intensity.