When a blaring siren moves away from you the wavelength of sound increases, therefore the correct answer is option C.
The Doppler effect is a phenomenon that occurs when two objects move closer or farther apart, increasing (or decreasing) the frequency of sound, light, or other waves.
The Doppler effect is to sound waves as well for the light waves
The apparent shift in the frequency of the sound that the observer perceives as a result of relative motion between the source of the sound and the observer is known as the Doppler effect of sound.
As given in the problem when a blaring siren moves away from you there is a decrease in the apparent frequency resulting in the increase in the wavelength of the sound
As frequency and wavelength are inversely proportional to each other.
Thus, The correct answer is option C because the wavelength of sound increases as a siren moves farther away from you.
Learn more about the Doppler effect from here
https://brainly.com/question/15318474
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