Final answer:
The indicators measured by the HDI include education, gross national income, and life expectancy.
Step-by-step explanation:
The indicators measured by the HDI (Human Development Index) include education, gross national income, and life expectancy.
Education: The HDI considers educational attainment, including adult literacy and primary, secondary, and post-secondary enrollment.
Gross national income: It also incorporates purchasing-power-adjusted per capita real GDP, which is a measure of a country's economic development.
Life expectancy: The HDI takes into account the average life span, as it is an important indicator of a nation's well-being.