During the holidays. a band is playing outside ofa shopping mall next to a stop light. You roll the window down to listen for a moment. As you pull up towards them. you notice that the pitch of the music seems to he a little higher than you are used to for that song. Which description best explains why the pitch is higher as you drive towards from the band? 0 Diffraction between instruments 0 Interference of sound waves 0 Decrease in wave frequency 0 Increase in wave frequency