The five letter word is shave
Answer:
The word "protracted" means lasting longer than expected, or unusually long, so what protracted most clearly means based on the context of the excerpt is how the time period of celestial motion studies must have lasted unusually long.
I'm fairly certain it's the first answer but it may be the third answer as well but I believe it's the first more though.
Answer:
I'd say so. Many youths have disabilities and are bullied for it. Some youths speak out about it because it is actually a real problem. People with disabilities are just victims of something unfortunate, but that doesn't make an excuse to bully them about their condition.
