Explanation:

• Footloose industry is a general term for an industry that can be placed and located at any location without effect from factors such as resources or transport.
• India has several industrial regions like Mumbai-Pune Industrial region, Hugli industrial region, Gujarat Industrial region etc.
• The location of these industrial regions is determined by several factors like Raw material, Power, transport, labour, government policy, market etc.
• The Chhotanagpur region extends over Jharkhand, northern Orissa and western West Bengal and is known for the heavy metallurgical industries.
• This region owes its development to the discovery of coal in the Damodar Valley and metallic and non-metallic minerals in Jharkhand and northern Orissa.
• Proximity of coal, iron ore and other minerals facilitated the location of heavy industries in this region.
• Six large integrated iron and steel plants at Jamshedpur, Burnpur - Kulti, Durgapur, Bokaro and Rourkela are located within this region.
• To meet the power requirement, thermal and hydroelectric plants have been constructed in the Damodar Valley.
•  Densely populated surrounding regions provide cheap labour and Hugli region provides vast market for its industries.
• Heavy engineering, machine tools, fertilizers, cement, paper, locomotives and heavy electricals are some of the important industries in this region.
• Important centres are Ranchi, Dhanbad, Chaibasa, Sindri, Hazaribag, Jamshedpur , Bokaro, Rourkela, Durgapur , Asansol and Dalmianagar.