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

Which historical detail can best clarify a reader’s understanding of the information in the excerpt? immigrant factory workers who spoke the same language were separated from each other at work. immigrant factory workers who spoke the same language were known to talk too much at work. immigrant factory workers had to pay rent for their chairs and the supplies they needed at work. immigrant factory workers were crowded into unsafe buildings with locked doors and fire escapes.

What does pip gain on his 21st birthday instead of knowledge of his benefactor

In what way do you think it would be difficult to live next to the united states