(i) A footloose industry is an industry which can be located anywhere like electronics, garments manufacturing, etc. Proximity to the location of raw material is not required. A key industry is one that can be located in the areas of location of raw materials like iron and steel.
A key industry is the mother of all the industries.
(ii) Footloose industry : e.g. computer chips
industry. Key Industry : e.g. Iron and steel industry.