Does the author provide sufficient evidence to support the claim that high numbers of tourists are a potential danger to some national park sites?

Which literary device does orwell most use to support his purpose in writing in this passage? characters, to show that what happens on the farm is fiction allegory, to show similarities between the farm and the soviet union point of view, to show how the characters think about the murders setting, to show that events in the soviet union may have been caused by the economy