Concept:Localisation of industries means the grouping or concentration of firms of the same industry in one specific area or region.Explanation:When many firms belonging to a particular industry are set up close together in a single locality, it is called localisation of industries.This occurs because of advantages such as availability of raw materials, skilled labour, power, or market facilities in that area.It represents a form of territorial or regional specialisation, where a particular region becomes known for producing one type of good.Answer:C. Localization of industries.