Which aspect of educational systems does IEA closely analyze?

The correct choice highlights that the IEA closely examines educational policies, resources, and learning environments as crucial elements of educational systems. This comprehensive analysis allows the IEA to assess how various factors affect student learning and educational outcomes across different countries.

By focusing on educational policies, the IEA investigates how decisions made at the governmental or institutional levels impact the overall effectiveness and equity of education. The analysis of resources provides insight into the availability and distribution of financial, material, and human resources, which are critical for supporting learning. Additionally, examining learning environments encompasses the physical and social settings in which education occurs, revealing how these conditions facilitate or hinder students' educational experiences.

This multifaceted approach enables the IEA to provide valuable data and insights that help educators, policymakers, and stakeholders understand what works well in education systems and identify areas for improvement.