Explanation: Industries using weight-losing raw materials are located in the regions where raw materials are located.

• Why is the sugar mills in India located in sugarcane growing areas? Similarly, the locations of pulp industry, copper smelting and pig iron industries are located near their raw materials.
• In iron and steel industries, iron ore and coal both are weight-losing raw materials.
• Therefore, an optimum location for iron and steel industries should be near raw material sources.

Source: NCERT – India People & Economy