Hi, the answer for this question is element!
Hope this helped!
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~Nate
Sound needs medium to travel and it can not travel without medium
so sound wave is a travelling wave
now we also know that sound wave propagate in form of rarefaction and compression.
So all medium particles travel in the direction of wave only
so it is a longitudinal wave also
so correct answer will be
<em>mechanical longitudinal </em>
Hello.
The answer is: D. wavelength
This is correct because frequency x wavelength = speed
Have a nice day
