Concept:Urban industries cluster around markets, labour, and infrastructure, not around raw material sources.
Explanation:In developing countries, urban centres have large populations, creating high demand for goods.
These areas also provide a steady supply of labour for factories.
Good infrastructure such as power, roads, and communication is another pull factor.
However, raw materials are usually obtained from rural or resource-rich areas, not from the cities themselves.
Therefore, the availability of raw materials in urban centres is not a typical reason for industrial concentration.
Answer:C. location of raw materials