Final answer:
A world population density map compared with the 'World Population by Income' chart illustrates global income disparities based on geographic location, showing how wealth is distributed. It reveals that high-income countries have a disproportionate share of the global wealth compared to their population size, while low-income countries have a larger population share but significantly less wealth.
Step-by-step explanation:
The information in a world population density map is related to the information in the chart 'World Population by Income' in several ways, depending on the aspect being compared. When considering how the map relates to the chart, a distinction can be made between visualizing how crowded a place is (population density) and understanding global economic disparities (distribution of wealth).
Option b, "The map illustrates global income disparities based on geographic location," aligns most closely with the data provided because a map can showcase the geographic distribution of different income levels. Comparing the map and the chart helps to visualize how wealth is distributed around the world and how it correlates with population densities. High-income countries, despite having a small portion of the global population, control a significant share of the world's wealth, while low-income countries, with a larger share of the world's population, have access to much less wealth.
On the other hand, options a, c, and d address different aspects. Option a relates to how crowded a place is without directly linking it to income levels. Option c merely states the function of the chart without making a comparative connection to the map. Lastly, option d suggests a correlation between income levels and environmental factors, which may not be evident from a standard population density map or the income chart alone.