Explanation:

Let’s break it down:

- Option 1: Individual unit

Microeconomics zooms in on individual units—think consumers, firms, a specific market, or a single product. ?? (Correct Answer)

- Option 2: Economic Aggregate

This is big-picture stuff—like inflation, unemployment, GDP. That’s actually what macroeconomics covers.

- Option 3: National Income

Checking out national income is also a macroeconomics topic. It looks at the sum total for a whole economy.

- Option 4: None of these

Since microeconomics really is about that individual unit (option 1), this isn’t correct.

So, the right call is Option 1: Individual unit