Answer:
C) the centralization of human populations living in densely populated cities
Explanation:
We refer to urbanization, as the people move to settle and form a city that will quickly spill over to nearby areas. The urban settlement has grown to susch a large population size and density that its quality of life or safety will be at risk. Since commercial, industrial and cultural centers now in the world are urban, they are having high pollution levels, and the environment is being damaged.
This leads to affect the health of the inhabitants, and lower quality standards of life.
The industrial revolution was the primary force leading the first settlements, and until the present the tendency worlwide is to ever increasing number of cities, the map below shos some important points to consider worlwide:
