Science experiments can be like “measuring how heart rate is effected by music “
I might be wrong but I think C ( what the wave it traveling through). I think C because a wave medium is the substance that carries a wave (or disturbance) from one location to another. The wave medium is not the wave itself and it doesn’t make the wave. It just Carries or transports the wave from its source to other locations.
Boys shoulders broaden and voice deepen, Girls start having menstrual periods and develop breast. <span />