Highest HDI to Lowest HDI:

(i) Norway
(ii) Ireland
(iii) Switzerland
(iv) Hong Kong

Explanation:

HDI, or Human Development Index, is a measure of a country's overall development and well-being, taking into account factors such as life expectancy, education, and income. A higher HDI indicates a higher level of human development.

(i) Norway:
Norway consistently ranks at the top of the HDI rankings due to its high standard of living, excellent healthcare system, and quality education. The country has a strong economy, low unemployment rate, and a high life expectancy. Norway's commitment to social welfare and sustainable development has contributed to its high HDI score.

(ii) Ireland:
Ireland also ranks high on the HDI scale, primarily due to its high standard of living and well-developed education system. The country has experienced significant economic growth over the past few decades, attracting multinational companies and creating job opportunities. Ireland's investment in education and healthcare has improved the overall well-being of its population.

(iii) Switzerland:
Switzerland is known for its high quality of life, strong economy, and well-functioning healthcare system. The country has a high HDI score due to its high life expectancy, high standard of education, and high average income. Switzerland's political stability and commitment to innovation have contributed to its overall development.

(iv) Hong Kong:
Although Hong Kong is not a country, it is included in the HDI rankings as a Special Administrative Region of China. It has a relatively high HDI score, primarily due to its high life expectancy and high average income. Hong Kong has a developed economy and offers a high standard of living. However, it is worth noting that the HDI for Hong Kong may not accurately reflect the overall well-being and development of its population, as it is a small region with unique political and economic circumstances.

In summary, Norway has the highest HDI among the given countries, followed by Ireland, Switzerland, and Hong Kong. These countries demonstrate a high level of overall development and well-being, with a focus on factors such as education, healthcare, and income.