A referee runs towards you while blowing a whistle, resulting in a sound with a greater pitch than when you heard the whistle at halftime and the referee was stationary. What is this an example of

Question was not very clear if there are specific answer choices tell me and i'll try to you more. hope this though2 laps is 1 min. we know that for each min she does two times the amount of laps. for 12 laps we can do 12/2 which does give us 12 laps in 6 mins not 16 mins.