Her strict application of the rules helps develop the theme of the need for compromise.
Miss Caroline throughout the book wars with Scout on many issues. Scout represents the tide of change in the next generation of society.
The speaker's ability to ok persuasive, sound persuasive, and act in a persuasive way, to show that people can trust that his side of the opinion of the subject is more important.
The definition of sloth would be laziness, unwillingness to work or act.
Two context clues are the word "idleness" and the phrase "doing of nothing". Idleness may mean boredom, but also dullness. Doing of nothing clearly supports the notion of not working, not acting.