Concept:Localization of industry means the concentration of firms producing similar goods in one area.
Explanation:Industries are encouraged to locate together for several advantages.
These include nearness to raw materials, availability of power, suitable physical and climate conditions, and supply of trained labour.
Access to capital and the growth of local industries also attract firms to an area.
Additionally, improvements in infrastructure such as roads, electricity, and communication make an area more suitable for industrial localization.
The momentum of an early start further strengthens this concentration because existing industries pull in new ones.
Among the given options, the most direct reason is the improvement of infrastructure.
Answer:D. Improvements in infrastructure.