When the author writes "you have the authority," what does she mean?

It means that she has the right to say that and nothing should stop her you have the power so you should speak up and say what’s right

Hope this helped

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.