Is the word leaf countable or uncountable noun?

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.

Which of the following best explains why the author chose the compare-and-contrast structure for paragraph 2

What did cherry mean when she said, “things are rough all over” ? the outsiders