The author can use many things such as sentence manipulation, the addition or lack there of for details, and even building up and tearing down momentum.
The plot of Antigone incorporates various elements of "Tragedy." Sophocles uses the character of Creon to demonstrate "Catharsis," when he claims to know the gods' wishes as to who should be rightfully buried and who should not. On the other hand, "Impulsiveness" is Antigone's tragic flaw, which, combined with matters of destiny beyond her control, leads to her downfall.