I think it's the third option. Not entirely sure though.
In a population pyramid, the size of the population under investigation is depicted on the horizontal axis, and age is aligned on the vertical axis. The result is a series of bars stacked on top of one another, each representing an age category (typically in 5-year age groups), with the youngest age group represented by the bottom bar and the oldest age group by the uppermost bar. The horizontal length of each bar represents the number of individuals in the specific age group for the population depicted.
Answer:
HDI refers to Human Development Index and it’s a measure of the key elements and areas of how citizens of the country develop. These can be measured through their average income, health care etc.
China- 0.761 85th
USA - 0.926 17th
Japan- 0.919 19th
UK- 0.932 13th
Saudi Arabia- 0.854 40th
Iraq- 0.674 123rd
