Step 1: Understanding the Concept:
Identify logical collocations that describe literary critiques of a social class. Step 2: Key Formula or Approach:
Approach: "Manners and morals" is a standard paired phrase in English literary criticism. Step 3: Detailed Explanation:
Literature often examines how people with new money ("nouveau riche") behave.
The phrase "manners and morals" refers to their social behavior and ethical standards.
Since this is a repeating topic, "theme" is the correct literary term to describe it. Step 4: Final Answer:
The correct pair is morals ... theme.