Original: According to Rowling, one of Harry's pivotal scenes came in the fourth book when he protects his dead schoolmate Cedric Diggory's body from Voldemort, because it shows he is brave and unselfish.
Simplified: According to Rowling, one of Harry's pivotal scenes came in the fourth book when he protects his dead schoolmate Cedric Diggory's body from arch villain Lord Voldemort, because it shows he is brave and unselfish.