What does macroeconomics primarily study?

Macroeconomics primarily focuses on the operation of a nation's economy as a whole. It examines aggregate indicators such as GDP, unemployment rates, and inflation, aiming to understand how these elements interact and affect overall economic performance. Through the lens of macroeconomics, analysts can assess how monetary policy, fiscal policy, and external factors influence economic growth and stability.

Understanding the broader economic trends rather than individual market behaviors or specific segments is key in macroeconomics. This comprehensive view enables economists and policymakers to develop strategies that can enhance economic productivity and stability on a national scale.

While other aspects mentioned in the choices, such as individual market behaviors, resource availability, and the development of economic theories, are essential components of economics as a whole, they fall under different categories - microeconomics for individual markets and applications or the theoretical side, and not macroeconomic principles.