Why does sophocles alert the audience to the romantic relationship between antigone and creon's son in scene 1 of the play antigone? to keep the audience interested to confuse the audience to add comic relief to add dramatic irony

The figurative language used in the sentence is called a simile. A simile is comparing one thing to another describing the to objects/terms as a like. You can tell is a sentence is a simile if the sentence has the words like or as when comparing to objects/terms. The sentence you stated has the word "like" ("...skinny and very short like a little sapling").