A tercet is a three line stanza.
It's not a genre, nor a rhyming scheme, nor is it a figure of speech. Tercets usually have more than 4 syllables per line.
The climax of a story is what the story revolves around, or the problem the character(s) is facing.
The literary device that the author used in the passage is hyperbole. A hyperbole is a figure of speech that uses extreme overstatement or exaggeration to have a humorous, ironic, or heightened dramatic effects.
Example: I am so hungry I could eat an elephant.
To tell readers what they are looking at and why is the image is relevant
