I would say it involves extensive research
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.
Think about it, 16 years old? You become a adult when you turn 18. You would also have to be more responsible because 18 is the age you're actions have huge consequences. If you're 16 the worst that could happen is that you get grounded!
Because giving a speech allows plenty of thought and preparation and it also shows that you are very confident than giving a persuasive essay.
