''PSA & Commercials''

1.P.S.A tells you something for your own good but a commercial tells you something for there own good. Example a P.S.A tells you to feed your kids breakfast.A commercial tells you to by there made in china stuff.
2.A. A song that is annoying or catchy because you will remember it.
   B.It being  funny.
  C.Its got good looking people on the commercial or P.S.A
3. A.Sound effects
B.memorable