https://phet.colorado.edu/sims/html/wave-on-a-string/latest/wave-on-a-string_en.htmlabove is the simulation link. can you help me answer the questions in the picture?

Use the simulation to make one observation about wave motion that you can't yet explain. One possibility is to select Pulse in the green box and Fixed End in the other green box. Then, select the triangle wave image on the wave generator and watch as the triangular wave pulse propagates to the right and is reflected. How does the reflected wave pulse compare to the original wave pulse