I think it is planet a orbits faster than planet b so sorry if I get it wrong but I’m pretty sure that’s what it is good luck!
College fair? I really cant say based off the lack of context clues in the question and no additional information.
Https://foreignpolicy.com/2015/10/05/irans-identity-crisis/
The answer is the table of contents because it tells you where to find every lesson that is in the book
