Antonyms — Choose the closest opposite of ‘‘EXTRAVAGANCE’’ (budgeting vocabulary: spending vs. saving).

Given data

• Noun: EXTRAVAGANCE = wasteful or excessive spending
• Options: Luxury; Poverty; Economical; Cheapness

Concept/Approach
The antonymal idea is prudent use of money. While the exact noun opposite is 'economy'/'frugality', among the provided options the best opposite is the adjective 'economical' (showing thrift; avoiding waste).

Why others don't work
Luxury: often accompanies extravagance; not opposite.Poverty: lack of money, not the habit of spending vs. saving.Cheapness: implies low cost/shoddiness; not disciplined spending.

Usage lens
Extravagance in décor ↔ an economical approach to décor.

Final Answer
Economical