A major factor contributing to productivity is

A major factor contributing to productivity is

  1. The labour force ✓
  2. The rate of GDP per year
  3. The baby boom of generation
  4. Immigration of young workers

Explanation

This answer correctly explains the economic concept. Economics studies how people make choices about limited resources.

The other options describe different economic ideas or situations. They don’t fit what this question asks.

Remember this economic principle when thinking about money, trade, and how markets work.