I will make the first answer the brilliantist but plz make sure that the answer is clear enough and plz explain the answer as well ​

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.

Explanation:

answer; critical thinking;

a is your answer hope this ! : )