The only possible awnser to that question in my mind right now will be the hat is made of nails.
Without hats, people will get hot in the sun. Some hats can shade you.
People who want to keep the sun out of their eyes wear hats. People who want the keep their head warm wear hats. People who just want to look cool also wear hats.
people are not allowed to wear hats inside the church
People,soldiers,workers,cowboy.etc wear hats.
It is unclear how many people in school wore hats as this information is not provided.
They make hats and hats were worn by everyone.
People who make hats are known as 'Milliners' The industry itself is called 'Millonry'
hurting people
To prevent ozone hurting people, CFC's must be banned. They are the ones that deplete ozone.
Some people
Berrets
They wear it