Answer: Business, Government and Household sector
Step-by-step explanation: A circular flow diagram shows the flow of goods and services between the firms, households and the government. Role of each sector,
Business- Supply goods and service to the households and government sector in return for revenue and make factor payments to the households.
Household- They supply factors of production to the government and the business sector in return for factor payments and purchase goods and services from them.
Government- This sector produces goods and services, taxes the households and business sector and also provides transfer payments or subsidies to them.