The correct answer is Democracy Index.
The Human Development Index (HDI) is a composite statistic of life expectancy, education, and per capita income indicators, which are used to rank countries into four tiers of human development. A country scores higher if it performs better on these indicators.
Life expectancy is a measure of the average number of years that a person is expected to live. It is calculated by taking into account the age-specific death rates in a population.
Per capita income is a measure of the average income of a person in a country. It is calculated by dividing the total income of a country by its population.
Literacy rate is a measure of the percentage of people in a country who can read and write. It is calculated by taking the number of literate people in a country and dividing it by the total population.
The Democracy Index is a ranking of countries’ democracies by The Economist Intelligence Unit. It is based on five categories: electoral process and pluralism, civil liberties, functioning of government, political participation, and political culture.
The Democracy Index is not a component of the HDI because it is not a measure of human development. It is a measure of democracy, which is a different concept.