A crucial moment is when Ender fights what he thinks is the final test but then comes to find out that it is the last battle of the third invasion. That is very important because Ender becomes the new Mazer Rackham and saves the world from a buggers invasion that could have swept away the entire human being race. Another moment considered crucial would be when Ender kills bonzo and stilson because it helps show who he really is. If Orson Scott Card didn't add that to the novel you would just get the impression of a kid that's going to a school because he's smart and won't be able to defeat the buggers. With the violence added the reader has hope that he will be able to be the next Mazer
A crucial moment is when Ender fights what he thinks is the final test but then comes to find out that it is the last battle of the third invasion. That is very important because Ender becomes the new Mazer Rackham and saves the world from a buggers invasion that could have swept away the entire human being race. Another moment considered crucial would be when Ender kills bonzo and stilson because it helps show who he really is. If Orson Scott Card didn't add that to the novel you would just get the impression of a kid that's going to a school because he's smart and won't be able to defeat the buggers. With the violence added the reader has hope that he will be able to be the next Mazer