Why does joy get sad after bing bong died

This passage from chapter 4 of story of my life is an example of which story of plot

Geoffrey is writing a paper investigating friendly-fire incidents in recent us military actions. which paragraph topic would be relevant to his paper and would therefore merit inclusion in his final draft? a) a paragraph criticizing us military actions in the viet nam war b) a paragraph discussing how friendly-fire incidents are investigated c) a paragraph describing what basic boot camp is like for a new army enlistee eliminate d) a paragraph discussing how hard an extended military service can be on a family

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