QUIZ!!! WHAT WOULD BE THE THIRD PIC IN THIS SEQUENCE AND WHY???

I hope this works! ☺️ I saw this quiz on the British TV show Only Connect, and I *think* it will work on Li.st. If you want to play, please add a pic that you think completes the sequence and explain your reasoning, OK?
  1. Picture 1:
  2. Picture 2:
  3. Picture 3: ???