Final answer:
Catherine's response to the quarrel is characterized by irony.
Step-by-step explanation:
Catherine's response to the quarrel is primarily characterized by irony.
The author uses irony to create a contrast between Catherine's emergence from self-imposed seclusion and the heated argument between Heathcliff and Edgar.
This contrast highlights the complexity of Catherine's emotions and her ability to navigate difficult situations with a sense of detachment and perspective.