Tanya and Valentina were traveling in a rowboat, as the way they were being propelled through the water was oars.
The correct revision is..
"You're being dramatic," said Eliza.
"I don't think it's dramatic to say that you're going to fail the humanities class if you don't pass its final exam," replied her mother.
You're is short for you are. It's is short for it is. You use its for possession.
You need to take the main parts out of the excerpt to figure out what the excerpt is trying to teach you as the reader. After you determine that you must figure out what the main idea is and the topic of the excerpt.
Hope this helps.
