"i see a vacant seat," replied the ghost, "in the poor chimney corner, and a crutch without an owner, carefully preserved." what do these lines mean?

Those line mean that if Scrooge doesn't help the Cratchit family, the boy will probably die. Tiny Tim has to walk using crutches because he is suffering from a terrible disease (probably polio) and the Ghost says that if he doesn't get the medical help he needs, he will probably die and leave 'a crutch without an owner.'

“the globe theatre is housed in an open arena the layout of the open air arena, featured the ‘ pit’ or the ‘yard’. the globe had a raised stage at one end and was surrounded by three tires of roofed galleries with balconies overlooking the back of the stage. the stage projected halfway into the ‘pit’”. i hope this information you .