Prepare a chart that compares India, Spain, and South Africa based on the data you find. Describe the key differences between the countries. Rank these as high-, medium-, and low-income countries, explain what is surprising or expected about this data.

Based on the collected data, key differences between India, Spain, and South Africa are observed in GDP per capita and HDI rankings. Spain is categorized as a high-income country, South Africa as a medium-income country, and India as a low-income country. These classifications are primarily based on GDP per capita but also consider other indicators that contribute to the overall picture of a country's income level. Some results may be expected, such as Spain having a high GDP per capita, while others may be surprising, like South Africa's relatively low HDI ranking despite its medium-income status. Possible explanations for these differences include differences in economic structure, government policies, and social factors.