Explanation: In the context of urban economics, particularly in a city like Mumbai, economic challenges are multifaceted and deeply intertwined with social and environmental issues. However, the core economic challenges are those that directly impact the job market, income levels, and the overall economic productivity of the city.
Option A discusses air pollution, which is a significant environmental issue in Mumbai. The problem is exacerbated by relaxed pollution laws, a high number of vehicles, and extensive construction activities. While air pollution can have economic implications, such as increased healthcare costs and reduced productivity, it is primarily categorized as an environmental challenge.
Option B addresses the water supply issue in slums, where the water supply is often limited to a few hours per day. This is a social and infrastructure challenge that affects the quality of life and health of the residents. It is not directly an economic issue, although it can have economic repercussions in terms of health and productivity.
Option C correctly identifies the economic challenge of low-skilled and poorly paid jobs. This is a direct economic issue because it affects the income levels of the workforce, which in turn impacts the overall economic productivity and the standard of living in the city. Low-skilled jobs often do not provide sufficient income for workers to meet their basic needs, leading to economic hardship and social inequality. This situation can also limit the potential for economic growth and development, as it does not encourage skill development or higher productivity.
Option D mentions river pollution, which is another environmental issue. The pollution of rivers by sewage and industrial waste can have economic implications, such as the cost of cleaning up the pollution and the impact on industries that rely on clean water. However, it is primarily an environmental challenge rather than a direct economic one.
In summary, the economic challenges in Mumbai, as highlighted in Option C, are those that directly affect the job market and income levels. These challenges are crucial for understanding the broader economic context of urban areas and the socioeconomic issues that arise from them.