Which of the following best describes the impact of urbanization on cities?

The choice of increased urban infrastructure development accurately reflects the impact of urbanization on cities. As urbanization occurs, more people move into urban areas, resulting in a higher population density. This surge in population necessitates the expansion and enhancement of infrastructure, including transportation systems, housing, sanitation, and public services. Cities must adapt to accommodate the growing number of residents, leading to investments in both physical and social infrastructure.

In contrast, the other options relate to outcomes that typically do not align with the trends seen in urbanization. For instance, urban population density often increases rather than decreases, city sizes generally expand to accommodate growth, and urban job markets typically evolve rather than simply decline, albeit challenges may arise in specific sectors. This understanding of urbanization highlights the need for cities to develop robust infrastructure to support a thriving urban population.