Is the language in the following passage formal or informal?

this is a work of fiction. the characters, incidents, and dialogues in this book are products of the author’s imagination and do not actually exist. any similarity to actual events, or to persons living or dead, is entirely coincidental.

formal

informal

Afirefighter is a rescuer extensively trained in firefighting, primarily to extinguish hazardous fires that threaten life, property and the environment as well as to rescue people and animals from dangerous situations.  just cut some parts to make them shorter and add some of your facts or what describes them most. or what they are supposed to do.