Answer:
The Human Development Index ranks countries into four tiers of human development:
Life expectancy (measuring blue zones as well)
education (expected years of schooling, average years of schooling)
per capita income
A low hdi can be caused from lack of skill and illiteracy, food shortages, and lack of minimum human necessities(clothing, clean water, health).
the level of education, plays a vital role in the progress/growth of a country. Discrimination in social status is also a big key.
Step-by-step explanation: