Explanation:

- Option 1: Macroeconomics

- Focuses on large-scale economic factors.

- Studies economies as a whole, such as national economic growth, inflation, or unemployment.

- Option 2: Microeconomics

- Deals with individual units like households and firms.

- Analyzes supply, demand, and price in markets at an individual level.

- Option 3: Income and Employment Theory

- Examines how income and employment levels are determined.

- Often related to macroeconomic factors.

- Option 4: Development Economics

- Focuses on economic development and growth in countries.

- Addresses issues like poverty alleviation and improving living standards.