This is a metaphor that is commonly used in the English language. This simply means that to remove a connection from someone, just like the olden days, you burn the bridge or set it on fire so that no one can cross it again or get to you. To change is to burn the old bridges of the past and head on straight to a journey of the unknown.
her nephew is a rude, obnoxious child
subject : nephew
linking verb : is
Reading is important in school and in many careers.
A. Brave
I think he’s brave since he is doing this during a war