What is the meaning of this phrase Followed by a frightening growl

Followed by a frightening or unfriendly low noise.

Explanation:

A growl is a frightening or unfriendly low noise. This word usually refers to the sound animals make when they are feeling threatened or exhibiting aggression. However, it can refer to other things as well, for example, a low unpleasant noise coming from thunder or a machine. We can even say that a person who is saying something in an unfriendly and angry way is growling.

no its not this is a very legal platform

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.