They are not. That was made up by the reporter.
That is just how J.K. Rowling made her. There is no 'whys' about it. She made her characters up.
No, because ghosts ae made of energy, and energy can't burn.
give up the ghost
Giving Up the Ghost was created on 2007-11-22.
One of the Jesse Belle's is a actor -or so i think, Ive been goggling him/ her and one of them is a made up fake ghost from the Suite Life On Deck, i googled up Jesse Belle Ghost and found nothing besides the ghost from suite life on deck.
Marshmallow
They are made from the imagination of people. They are not real.
Ghost dance was made in 1981 by christopher Bruce.
This question is impossible to answer as you have not made it clear which ghost you are referring to.
The ghost bee story would actually end up as a mysterious cliffhanger. The person that started off telling the story of the ghost bee will admit that it was all made up, but the lead character will realize that there has to be at least some truth to it - and he has the mysterious sting marks to prove it.
He wasn't a ghost. He was a giant Stay-Puff Marshmallow Man. He was made of marshmallow.